The sexual act of putting a dildo on your head like a rhino and sticking a McNasty through it and having your partner eat it while sucking the dildo.
Girlfriend: I had a McNasty with sexual pleasure last night. I had a McNasty Rhino!
by McNugget D June 26, 2014
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A general cry of disbelief or annoyance. Can also be said as an agreement with someone else's annoyance.

Derives from a batman comic.
'Did you hear Jimmy Fallon is taking over Late Nite'
'Balls McNasty. I hate Jimmy Fallon.'

or

(reading newspaper) 'Balls McNasty, Jimmy Fallon is taking over from Conan!'.
by Haronzo May 26, 2008
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Freak mcnasty is another way of calling someone a nasty freak, but saying it in a humorous way without offending them.
Jay: I love when girls like my asshole!
Nene: Omg!! You are such a freak mcnasty!
by Love~Neezy July 3, 2009
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An absolute uberbitch. Usually a bitter woman approaching middle age that is angry because she has never had a good orgasm. Or she is bitter because she was unknowingly recorded having anal sex with the hired help. Yeah, that chick. Can sometimes be a college age girl who believes she is hotter than the sun and therefore the world should kiss her ass.
That chick is such a Cunty McNasty, who gave her a swirly while taking her from behind?
by Charlie Cakes April 18, 2008
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A mythical young man of rather dubious character.
We'd like to have you all join in with us on this one, and help us find the groove, by patting your feet, or popping your fingers, or clapping your hands, or shaking your heads, or shaking whatever else you want to shake... while we do a little thing we call "Filthy McNasty".
by godwallop July 24, 2006
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The act of inserting your finger or thumb into a female's anus while receiving felacio; resulting in a violent yet pleasant explosion. It is then customary for the male to slap the in the face with his penis for good luck. This maneuver was introduced to the 'Merica in the late 90's
Giving a bitch the ole Patty McNasty is the best thing since sliced cheese.
by GIMMExYOxSHOES May 13, 2013
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1.)A person who is trying to be mad in a situation who really isn't mad.
The person may:
-Throw a tantrum. Ex: Crossing one's arms and kicking one leg about.
- Make a mean face. Ex: Frowning or Shifty-eyes.
- Make angry sound effects, usually done when a mean face is performed. Ex: Quick grunting, or low growling.
- Giving someone an obvious silent treatment. Ex: When you say 'Omg, where did you go?' Looking in the distance when the person is standing in front of you.

People become a Sassy McNasty when:
- They are being a brat and not getting their way.
- They lose in playful competion such as board games or trivia.
- They run out of comebacks.

Words can be added as a 'suffix' to more personalize the title, but they don't change the definition.
'You throw the game board at me because I beat you at monopoly? Have fun cleaning up the houses and hotels scattered across the room you Sassy Mcnasty.'

If you were to make fun of someones pants and they were acting like a Sassy McNasty because they didn't have a comeback, you could call them a Sassy McNasty Pants.

by Xybergate April 6, 2009
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