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.
Shawn : dude , thats the Asstin effect. ur gay.
by Dont worry , be happy November 1, 2009