From MopedWiki

A favorite exclamation of The Bombardment Society. Made popular by Matt Waldbillig, this phrase applauds personal and group victory in all facets of life, especially partying.

Examples of useage:
That's what you get when you fearlessly kill Abe Lincoln. We wing!
Did you guys see Emily last night? She totally wung.
F.A.G.G.O.T.B.S. WE HAVE A WINGER!