- Tail wagging the dog
- Take a back seat
- Take care of the pence and the pounds will take care of themselves
- Take down a peg or two
- Take potluck
- Take the bit between your teeth
- Take the cake
- Take the gilt off the gingerbread
- Take the Mickey
- Take the upper hand
- Take umbrage
- Take with a grain of salt
- Taken aback
- Taken for a ride
- Talk of the Devil
- Talk the talk
- Talk through one's hat
- Talk to the hand
- Tall story
- Tanstaafl – (there's no such thing as a free lunch)
- Tattoo phrases and sayings
- Tawdry
- Tea leaf
- Teensy-weensy
- Technicolor yawn
- Tell it to the marines
- Tell me about it
- Tempest in a teapot
- show your mettle
- That's all folks!
- That's all she wrote
- That's one small step for a man, a giant leap for mankind
- The ants are my friends, they're blowing in the wind
- The apple of my eye
- The back of beyond
- The balance of power
- The balance of trade
- The bane of my life
- The bee's knees
- The belle of the ball
- The best defense is a good offence
- The best laid schemes of mice and men
- The Big Apple
- The Big Easy
- The birds and the bees
- The bitter end
- The blind leading the blind
- The bread of life
- The buck stops here
- The call of the wild
- The camera cannot lie
- The Canting Crew
- The cat's pajamas
- The chickens come home to roost
- The child is father to the man
- The collywobbles
- The course of true love never did run smooth
- The crack of doom
- The Crapper
- The customer is always right
- The cut of your jib
- The dark side
- The darkest hour
- The darkest hour is just before the dawn
- The Devil has all the best tunes
- The Devil Incarnate
- The Devil is in the details
- The Devil makes work for idle hands to do
- The Devil take the hindmost
- The Devil to pay
- The die has been cast
- The dog days of summer
- The early bird catches the worm
- The elephant in the room
- The emperor's new clothes
- The empire on which the sun never sets
- The ends of the earth
- The exception which proves the rule
- The face that launched a thousand ships
- The fat of the land
- The female of the species is more deadly then the male
- The fifth estate
- The floozie in the jacuzzi
- The fly in the ointment
- The full monty
- The game is afoot
- The game is up
- The grass is always greener on the other side of the fence
- The great unwashed
- The hair of the dog that bit you
- The hairy eyeball
- The heebie-jeebies
- The Ides of March
- The jury is still out
- The land of nod
- The last straw
- The law is an ass
- The life of Riley
- The living daylights
- The long arm of the law
- The love that dare not speak its name
- The monstrous regiment of women
- The more the merrier
- The moving finger writes
- The mutt's nuts
- The nth degree
- The opera ain't over till the fat lady sings
- The pen is mightier than the sword
- The pip
- The pits
- The pot calling the kettle black
- The powers that be
- The proof of the pudding is in the eating
- The quick and the dead
- The real McCoy
- The road less travelled
- The road to hell is paved with good intentions
- The salt of the earth
- The seven-year itch
- The shoemaker always wears the worst shoes
- The short end of the stick
- The shot heard 'round the world
- The sky's the limit
- The smallest room in the house
- The spirit of the staircase
- The straw that broke the camel's back
- The tail wagging the dog
- The toast of the town
- The third degree
- The triumph of hope over experience
- The upper hand
- The usual suspects
- The whole kit and caboodle
- The whole nine yards
- The whole shebang
- The writing is on the wall
- The wrong side of the blanket
- The year dot
- The Yellow Peril
- There is more than one way to kill a cat
- There are three kinds of lies…
- There but for the grace of God, go I
- There is no alternative
- There's an R in the month
- There's method in my madness
- There's more than one way to kill a cat
- There's no fool like an old fool
- There's no place like home
- There's no such thing as a free lunch (Tanstaafl)
- There's no such thing as bad publicity
- There's one (a sucker) born every minute
- There's one law for the rich and another law for the poor
- They couldn't hit an elephant at this distance
- Thick and fast
- Thick and thin
- Thick as thieves
- Thick as two short planks
- Thin air
- Thing of beauty is a joy forever
- Things that go bump in the night
- Think outside the box
- Thinking cap
- Third degree
- Third time lucky
- Thomas Paine
- Thorn in the flesh
- Thou shalt not kill
- Though this be madness, yet there is method in it
- Three score and ten
- Three sheets to the wind
- Three strikes and you are out
- Through thick and thin
- Throw a spanner in the works
- Throw the towel in
- Throw good money after bad
- Throw your hat into the ring
- Thumbs up
- Thus far into the bowels of the land
- Tic-tac-toe
- Ticked off
- Tickle the ivories
- Tickled pink
- Tide over
- Tie the knot
- Till the cows come home
- Time and tide wait for no man
- Time's winged chariot
- Tinker's dam
- Tilting at windmills
- Tissue of lies
- Titfer
- Tit for tat
- Tits up
- To a T
- To all intents and purposes
- To be or not to be, that is the question
- To beat the band
- To beggar belief
- To boldly go where no man has gone before
- To boot
- To cast the first stone
- To err is human; to forgive divine
- To gild refined gold, to paint the lily
- To sleep: perchance to dream: ay, there's the rub
- To the manner born
- To the nth degree
- To travel hopefully is a better thing than to arrive
- Toast of the town
- Toe the line
- Toe-curling
- Toffee-nosed
- Tom, Dick and Harry
- Tommy Atkins
- Tomorrow is another day
- Tongue in cheek
- Too big for your breeches
- Too much of a good thing
- Toodle-oo
- Toodle-pip
- Tooth and nail
- Top dog
- Top drawer
- Top notch
- Topsy-turvy
- Total shambles
- Touch and go
- Touch with a barge-pole
- Touch wood
- Touchy-feely
- Tout de suite
- Tower of strength
- Train surfing
- Trick or treat
- Trip the light fantastic
- Trouble and strife
- True blue
- Truth is stranger than fiction
- Truth will out
- Tuckered out
- Tudor phrases and sayings
- Turn a blind eye
- Turn of phrase
- Turn the tables
- Turn up for the books
- Turn up trumps
- Twelve good men and true
- Twenty three skidoo
- Twenty four seven
- Two cents worth
- Two heads are better than one
- Two peas in a pod