Euphemism for sex. Gimmick is a catch-all word that ultimately became a nickname for penis, hence slipping someone the gimmick would be slipping a girl your penis.
"I heard Dave and Abi went out and he is going to slip her the gimmick."
by -MR July 3, 2008
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To have sex with; usually using the objective case pronoun, i.e., slip/slipped/slipping her the bone.
by Vanderweasel September 16, 2019
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To have consenting sexual intercourse with a woman, to penetrate the vagina with the penis.
"Did you see Glenn Beck interviewing Quitter Palin on Faux the other day?"

"Yeah, he was a complete and utter quittergazer, I've never seen anything like it. It was almost as if he thought she made sense. He was just staring into her eyes as if he was caught in some kind of spell.

I honestly thought he was going to pull down his trousers and try slipping her a length."
by Arlo Barlow August 28, 2010
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1. When a senior (usually highschool) has some form of sexual intercourse with a female of a lower grade (Junior, Sophomore, Freshman)
"Ashley wants me dude. I'm gonna slip her the senior d. Yeah I realize she's only a freshman but don't worry about that."
by PolishThug April 1, 2010
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To slide your penis into the vagina of an unsuspecting female. Usually done from behind while spooning together in bed.
Dan: Hey man, how was it with that chick last night? Did you slip her the old Pringles can?
Phil: No man, i tried, but she smacked me.
by That guy... seriously... January 24, 2011
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When you shove a rock in a females butt while doing it doggy style
My date was being too quite so I slipped her the weaver
by Pat attack February 16, 2023
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