SIIHP

While the S can have varing terms it generally means
Slip it in her pooper, however the S can mean, Stick, Shove, Slam, Sneak, or Stuff

Person A - You going out with that chick tonight?
Person B - Yeah
Person A - Don't forget to SIIHP

by Garret Werstiuk May 16, 2006

SIIHP

Acronym for "Stick it in her"

if you can't figure out the P part, you'll probably never use (or experience) this acronym anyway.

Who cares if it's "that time of the month", I say go ahead and SIIHP

by Jeffrey Ross May 08, 2006