" Scrub up "
Make an effort to present oneself well dressed and smartly turned out.
I'd only ever seen Jim in jeans before. Now he's in a suit and had a haircut I think he scrubs up really well.
Where did it originate?:
Derived as an allusion to the intensive scrubbing that surgeons undertake to be especially clean for operations.
Where is it used?:
Hear the idiom spoken: