Stick In the Mud and Old Fogey

Can anyone tell me what's the meaning of "sticks in the mud"?

Main Entry: stick-in-the-mud
Pronunciation: 'stik-&n-[th]&-"m&d
Function: noun
Date: 1733

one who is slow, old-fashioned, or unprogressive; especially : an old fogy

Thought you might be interested in the origin of "Old Fogey"
He's an old fogey, used to describe someone as a bit old fashioned: out of touch with modern things. Why Fogey? In 1811 an "Old Fogey" was a nick name for an invalid, wounded soldier; derived from the French word fougeux, fierce or fiery. The modern sense has changed the use a little, but there is still the element of invalid in the saying.