when you and/or someone have gone down(oral) on the same girl. past or present girlfriend, stranger, fling, one night stand, f*ck buddy, or relative(not from the same family tree!!)
from the movie, No Strings Attached, the son had a girlfriend but they broke up, in the future the father started dated that same girl...the son's friends called him out on being tongue buddies for going down on the same girl
by JamesPDX January 03, 2012
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