quadruple penetration 

Much like "Double penetration" and "Triple penetration," it is the act of 4 male genitals entering a females body through each "hole," at least one "hole" will have two male genitals inside. "Hole" refers to the female vagina, the anal hole, or the mouth.

"Quadruple Penetration" may be prominent in something like porn.

quadruple penetration by Just another contributor October 30, 2013

penetration 

-To expand one's sexual horizons

-Forceful insertion of a flashdrive that doesn't quite fit in the USB port.

-That moment when your key doesn't fit in the keyhole, because it's the wrong key to begin with, so you shove that mother fucking bitch up in there.

-When you ram that big ass rhino horn into the tree. (Also see gay penetration )

Ben's penetration game is so strong. Headbanging with his 69 pringle-length wanker is a good time.

penetration by penetration_god April 2, 2015

penetrate

A synonym for inserting the penis into the vagina.

"So've any you chicks ever been penetrated before?"
-Glen Quagmire, Family Guy

penetrate by Dave October 20, 2004

Penetration State 

The name of the college formally known as Penn State.

Penetration state use to be a safe place for young boys.

Penetration State by Daytonadude November 29, 2011

penetration publications 

The best erotic story publisher around.

Reader- "Woah! Penetration Publications sure is rad! I found them at penetrationpublications.weebly.com

penetration publications by The_Penetrator April 9, 2014

gay triple penetration 

In the context of gay sex when three men are fucking one dude simultaneously. It can be arranged in a variety of ways. For example, one dick in the ass, and two in the mouth. Or maybe all three in the ass (good luck with that). Possibly two in the ass and one in the mouth. However, I’d like to see a quadruple penetration where all dicks are in the asshole cumming at the same time! Now that’s a show!

The straight frat boys were still talking about the gay triple penetration they experienced while drunk last week.

gay triple penetration by IAmGayAsFuckingFuck November 26, 2017

phalangeal penetration 

to insert fingers or toes into a bodily orifice. Aka. "fingering" or "fingerbanging" or "fingerblasting"

"Yo dude, did you hook up with that ho last night?"
"Yeah man, I gots me some phalangeal penetration, you know how I do. No big deal though."

phalangeal penetration by Allan Bridges February 24, 2008