Top Definition
to affiliate oneself to a non-relative female when enebriated for the sole purpose to get free drinks at a bar at 3am and if the cards are right there will be pseudo-incest later in the evening.
Pseudo-Bro: Hey bartender this is LC (pseudo-sis) she is my sister.

Bartender: You are LC's brother?? Well then drinks are on the house!

Pseudo-Bro: Sweet!
by Lanserlicious August 28, 2007
5 Words related to pseudo-sis

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