AUFK is a mnemonic for "Are You Fucking Kidding!"
A = Are, Y = You, F = Fucking, K = Kidding
This phrase is used to express great surprise or excitement.
If used in front of your Mom it carries an X rating.
To be used only with trusted friends.
DropDeadDimsel..."OMFG! I can not believe what just happened!"
DropDeadDismel..."I will bust my brother's knee-caps if he doesn't bring back my GTA-IV."