He was dressed to the tee (or t)

This is a mash up of two phrases describing perfection – “dressed to the teeth” (dressed very stylishly with nothing overlooked) and “to a tee (or t)” (perfectly).   “Dressed to the nines” (same definition as dressed to the teeth) also might be in the mix, but my guess is that the speaker was thinking teeth as tee and teeth are similar in sound.  Of course, it is possible that the person spoken about was dressed in a very stylish, perfect looking tee shirt, but doubtful.  Many thanks to Sam Edelmann for hearing this one and passing it on.

... shirt / Funny Formal Bachelor Party, Wedding, Prom, or Funeral Tux Tee