Here's a couple I've found that kid of work: linky1 linky 2, but for the most part I've had poor luck getting real "fuck you fatties" shirts.  EDIT: linky 3 for the ladies, cause, well, internet. I don't know you.    EDIT2: linky 4 this one's subtle. ish. Last EDIT; found a pintrest with a few. could use that to search for some. I'm out of fucks to give about it atm.