Top Definition
an abbreviation for "Stick It In Your Butt"
In context of dialogue:
"Did you let him siiyb?"
"Just for a second. Just to see how it felt."
by M. Howell October 29, 2007
an abbriviation for

"Stick It In Your Butt"
In context:
"Did you let him siiyb?"
"Just once just to see how it feels."
by Bridget Beyer October 24, 2007
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