Top Definition

(noun)A young man who is boinkin’ his stepsister.

(verb) to pound your stepsister into the mattress.

(verb) to fill every orifice of a stepsister at every available occasion.
Damn, man, you seen Tony? He's lost over 50 pounds on his new step-sister-sticker diet.

“Dude, I’m beat. I pulled off a 4 hour stepsister-sticker with Jasmin last night.”

“Man, I’d like to ask her out, but that big bastard over there is her stepsister-sticker.
by Mattress Mangler May 26, 2011
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