my favorite shirt growing up was plain black, in very small font it said "Nosy little (enter word you can't say on ehell) aren't you"
Always made me laugh. But so did the shirt Jesco White was wearing once that said in very larger letter "F you. I have enough friends."
Kinda showing my anti-social side here
A very dear college friend gave me that shirt for my birthday, except it's not very little font and... it's right across my chest.
I have a story associated with that shirt that I cannot make up:
I was heading home alone after going to a play. It was a cool night but I kept my jacket open, the edges just far enough to hint at wording. A rather inebriated man making his way in the opposite direction stopped in front of me. He squinted at me and said, bombastically, "I'm sorry, but I HAVE to see what's on your shirt!"
I gave him a thoughtful look as my mind slowly, slowly turned this happenstance over and over in my mind before thanking whatever Powers that Be for this opportunity. Mutely, I pulled away the edges of my jacket. He leaned forward enough to mouth the words before cackling gleefully.
"Yes I am!" he bellowed, laughing himself sick as I beat a quick retreat to my lodgings.
That said, I'm possibly bugging someone to get me this shirt this Christmas. Fun with math and stealth insults. http://cache.gawker.com/assets/images/comment/39/2011/11/e4e9c49aef4b18306475b4351ecc4af4/original.jpg