Top Definition
The process in which a boy gets his friend to dump his gf for him via text messgae the day after they kiss.
Bob : omg , I totally got my friend to dump my gf cuz shes a biotch

Shawn : dude , thats the Asstin effect. ur gay.
by Dont worry , be happy November 01, 2009
5 Words related to The Asstin effect

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