look up any word, like half chub:
Platonic friend of the female sex, accompanies her 'boy'friend out with the sole intention of helping him have sex with another woman. In the event of extreme intoxication or emergency the 'wing' title can be removed for a period no longer than one hour.
I was out all night with my wing-girlfriend and did not meet anyone. So we just went home together.
by BDiddy0420 March 29, 2011