Top Definition
sexual intercourse; when a man gets horny and thusly he and his women strip and hump their pelvis's together till they yell with happiness; fucking
Leonard did the nasty last night with Molly.
by natalie January 11, 2005

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plainly put...sex
john and emily did the nasty!
by christina November 11, 2003

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Having sex; making out
Maricela: Yo Hector let's go to my house and do the nasties!
Hector: Alright let's go before your parents get home!
by LiL AnT January 29, 2006

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Plain and simple: SEX!
Barbara and Ron did the nasty and she shat out a couple of carpet pig after just under nine months.

Look over there! Two crane flies doing the nasty! Now our lawn is going to have faggots (gay maggots) in it pretty soon!
by Telephony May 05, 2015

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sex
Barbara and I did the nasty last night
via giphy
by Papa Umau September 22, 2016

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A slang term for porn, sex, and masturbation.

Often used by people who want to describe one of the above three while not being too descriptive to avoid disgusting people near them.
Bob: Brah, Jenny and Brad are doing the nasties in their bedroom!
Many others: GET THE BINOCULARS!

Gabe: I caught my brother doing the nasties alone in his room yesterday.

Gabe: Holy shit! My brothers looking at the nasties again!
by FartFucker69 August 21, 2014

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The act of thrusting "Domino's Meatlovers Pizza" into a human vagina. Usually resulting in pizza remnants in said vagina, thus leading to maggot infestation of vaginal canal and surrounding genetilia.
Ben did you fuck Nikki last night?
No I did the nasty instead.
by Sailboatsmeller69 August 08, 2011

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The Urban Dictionary T-Shirt

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