Pronounced F-Wack..stands for Fatties Without A Clue. Did you ever get behind a couple of really obese people on the sidewalk or at the mall, and they are walking two or three abreast and there is no way to get by them. They dont even realize how slow they are going or how big they are.
Oh, great, I am in the Wendy's line behind a friggin' FWAC
by Kbilly May 17, 2005