Top Definition
siblings (either same or opposite sex) who advise, counsel and otherwise encourage the sexploits of the other(s)
I haven't gotten laid in awhile so I hit the bars with my sister and she hooked it up and I nailed her friend. I love having a wingsib.
#wingman #brosef #cock blocker #in house dating service #roll dawg
by jlw91383 December 25, 2010
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