What is Siihp?
1.
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
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2.
1. Refers to the input of a certain male appendage into the backdoor cavity of another individual. Can be referred to in the subject of backdoor sex.
2. Can also refer to the process by which a person has been screwed on and/or sufficiently used.
"Would you SIIHP?" While referring to the behind of another individual.
"I got SIIHPed hard by that exam."
"My bum is sore due to an occurance of SIIHPing with my significant other last night."
"SIIHP always before bed."
See
3.
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
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