Catching your grandparents in an act of sexual intercourse
DUDE!! You saw your grandparents doing it?!?!? That's not nasty, thats the nasty gone nasty!
by J-dubs and A-money September 16, 2005
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When describing something/someone you like or that you think is "hot"
Angelina Jolie is nasty.
Those shoe's are nasty, I want them.
by Miss V January 26, 2007
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The type of pussy you see on old women you are forced to do gynaecological examinations on, but heaps don't want to.
JJB: I've been doing pelvic exams all day. That's some nasty nasty puss.
by ApexB September 12, 2005
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usually associated with STD's that a female has.
"Jack slept with Jill and caught a case of the nasties"
"That girl has got a bad case of the nasties"
by Nicklos February 2, 2008
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She did the nasty nasty to Jerome
Made popular by the youtube rapper lil lucre & akuma.
by Lil lucre January 24, 2019
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A discrete word gay people can use to replace the actual word "gay" which can be used in public and doesn't prick up the ears of people listening in.

Background.. Many years ago, a wealthy man in the channel islands once was most dischuffed at his son being "nasty", and to cut a long story short used the term "You're not going to one of those nasty bars are you?".. And so it stuck and distributed..
Oooh, do you think he's nasty?
Whats your id on nastydar?
by MrG July 18, 2004
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When someone says something totally stupid. And the magnitude of what they said was so ignorant and idiotic that you are forced to walk away in disgust. That, is when you call them nasty.
Josue: Hey guys, I saw the world cup last night. Italy won.

Terrence: Oh snap, which Italy team?

Josue: Wow, Terrence you're nasty.
by Camo_San March 23, 2009
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