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When a penis is injected into a pussy or Anus and pleasure occurs!
Chad decided to Penetrate Kiersten & Katie while they were laying in bed naked making out .

Jim likes to Penetrate Chad while he's taking a nap!
by SlopNChop December 26, 2016
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2
A synonym for inserting the penis into the vagina.
"So've any you chicks ever been penetrated before?"
-Glen Quagmire, Family Guy
by Dave October 20, 2004
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3
When your pussy is penetrated by a dick
he grabs you and pushes you against a wall as you both give each other devilish smiles. You trace his shirt slowly down to his waist as he rubs his dick against your wet pussy. He places his hands on your hips as you put your hand under his jeans and down below. You feel his hard erected dick and smile at him evilly. You slowly unzip his pants and then his jeans so that his horniness intensifies. He then rips your skirt off and your pants off and licks his lips at your pussy. He throws you onto the bed and as you land with a thud he pins your arms down next to you and he'd tease your pussy with his dick as you kiss him. You moan and pull him down as he penetrates your pussy. You sound a huge inhale as you press your titties against his chest waiting for him to penetrate deeper
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4
To insert the penis into the Vagina or Anus.
I double-penetrated your mom last night, with my friend! Ha ha!
by i_r_sexy January 14, 2005
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5
The entering of one object into another, usually through some sort of semi-permeable membrane/skin/defense/covering.

See also:
1. Sexual penetration
2. Warfare penetration
3. Market penetration
4. Basketball penetration
5. Magical penetration
The addict will sometimes penetrate his arm with a syringe to inject drugs directly into his blood stream. This method of delivery is said to produce a more efficient high.
by Erinski Easy December 11, 2008
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6
The entering of some object into a females vagina or anus. or a mans anus. generaly considered to be a good thing.
"I penetrated that fag's arse with a rake."
by Penetration Man! October 10, 2006
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7
You get a good fuck when you penetrate.
It is much better than the woman giving you a hand job.
The sexspecialist grips tightly when I penetrate her
by St. Ias October 19, 2005
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