What is S.i.i.h.b.?
1.
Stick it in Her(or his)Butt. Any number of other slang words for butt can be substituted for Butt, including booty, bottom, bangbox, bobs ur uncle, etc...
"Hey man i met this awesome Chick!" reply..."Oh YEA? did you S.I.I.H.B.?" or My girlfriend wont let me S.I.I.H.B.
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Random Words:
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this is when someone sticks a firework up a fat womans crack it explodes and then the shitty skin melts and the clitoris pops and a sac ..