It was used in the vietnam war to describe new soldiers. It stands for Fucking New Guy.
Man I don't want to be stuck with this FNG.
by SleazyE October 24, 2004
Fuck Nose Weasel: A Term Created By Jake Nick And Chris Used To Descried Someone Being Fucknosey And Or Weasely
Grandma ate all the sunchips, yea whatta FNW
by theDrFNW January 22, 2011