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Someone who actually thinks he is mr. perfect.

Someone always ackin' like he knows too much and always actin' too perfect.
Maan, i didn't like Jay yesterday, cus he emberassed me infront of people actin' like he knows too much.

Jay was actin' to perfect like his name was Mcperf.
McPerf by Screwmatic August 12, 2008
slang for someone who has disappointed or made you angry. Use in place of douchebag, jerk, ball dropper...
The customer acted was a McPerrin to the cashier at Breadeaux Pizza.
McPerrin by N8 Deezy June 11, 2006
A cocky shallow male who thinks highly of himself that has no real concept of what love is; he will pick you apart because of his own insecurties and try to project perfection on you ; anyone (male or female)who claims to be perfect either has something to hide or is making up for something.
Wow, that guy thinks he is a McPerfect...I see right through his fake insecure bullshit.
McPerfect by Brittykitty March 14, 2008

McParfait 

The act of grabbing a fruit and yogurt parfait and cumming and pissing inside of it. You then shove the parfait into your girl's mouth. She will barf in 5 minutes of eating the parfait and she might menstruate a little bit. You then put your cummy dick in the girl's ass.
She never thought our relationship could get any worse, It did when I gave her a McParfait
McParfait by AN0SEater March 21, 2020

Lurky McPervert 

Any person who belongs to Nambla.
Priest Gahagan is a Lurky McPervert.
Lurky McPervert by ElGreatDan0 April 19, 2009

mcpeffie 

the sexiest person ever to walk this planet.
shes such a mcpeffie.
mcpeffie by keffa123445 February 24, 2021
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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