Definitions by John senior

fattywukup 

A fat daddy fucked up/ when a fat bitch gives you shit/ what it sounds like when an indian (not native) say's "your'e welcome"

"uh oh fattywukup"/ "she's a fattywukup"/ "thank's for the slurpy dude", "your'e fattywukup

fattywukup by John senior April 9, 2007