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Someone that believes he/she is something they are not. Someone full of it.
Ese tipo es un guillao(spanish)

That dude thinks he's all that
guillao by Nemo380 July 22, 2006
Words you can keep
Behold! Let me tell you a bit about French GUILLOM, since you seem to be interested! French GUILLOM is something ethereal! Something that cannot be described to words! It's...it's simply unanalyzable! You see, the thing about French GUILLOM is that we only know little to nothing about this "entity" as you call it. We know for certain:

1. it's French.

2. It can speak French, but has made the impression to us, GUILLOM researchers, that it's too withdrawn to have the courage to speak French, so it weirdly acts like it's Spanish instead (which we, GUILLOM researchers, highly doubt).

3. It is an object-sexual individual, from many precise investigations and reports that delineate instances of him trying to insert his penis into the structure of the Eiffel Tower, perhaps because it thought it could impregnate it.

4. It's intangible, which means it's unable to be touched and doesn't have a physical presence, though we are aware of his presence because of a special device we created called the G.D, and no, it doesn't stand for Gaucher Disease, but GUILLOM DETECTOR.
5. It appears to be a hermaphrodite, meaning it has both male and female sex organs! We were surprised to discover when we were attempting to scrutinize its existence using the GUILLOM DETECTOR, it isn't a male, for we've also found that it has a vagina and 6 breasts! Fascinating, isn't it? GUILLOM truly is an astounding creation of nature! We've never seen something like it before, in our entire lifetime!
GUILLOM
GUILLOM by Definitely not GUILLOM August 28, 2021
Related Words

Guillaume 

a really cool french guy, he's a sensation. No one can compete even if you try. He is better than everyone and don't even try denying it, you will get destroyed. If you ever confront him, you will lose, DO NOT EVEN TRY
stupid normal guy: Hey, do you know Guillaume?
good guy: Don't even mention him, you'll get destroyed!!
stupid normal guy: Guillaume?
*gets destroyed*
Guillaume by sweiufbwol August 5, 2018

Meat Guillotine 

Slap your friend's adam's apple with your penis while he's sleeping, then throw your hands up and scream "You Just Got Meat Guillotined", throw water on him, and walk out.
Hey John's sleeping, he's going to get a meat guillotine.

guillama 

that guillama sure can cook
guillama by Law Boy May 5, 2004

penis guillotine 

when, after lifting up the toilet seat to take a piss, the toilet seat falls, causing it to slam back down on your penis, much like a guillotine
Rick couldnt have sex for a week after he suffered a penis guillotine

Guillaume 

Guillaume will be the most amazing and sexiest person of all times, they can make you laugh until you die are gorgeous and at the same time when they show you their abs and sexy body and you just won't resist a ride in bed with them! at the same time a ride in bed with them is a YES because they have a big dick and know how to use it ! Don't pass the chance if you ever meet one !
Friend1: Wow Guillaume is so good in bed !
Friend2: I know I nearly fainted seeing that sexy body !
Guillaume by Mrcool123 May 24, 2015
More from Urban Dictionary

Is that cake?

Another way to say is this fake? Like the show real or cake
“Slayyyter just announced another album last night
“No way, is that cake?”
“Yeah whoops this isn’t real”
Is that cake? by Sexyyred September 15, 2026
Word of the Day on September 16, 2026

just fokin missing her

native american reservation origin... to miss an ex so badly that everyone can see it.. can be used for either sex eg. just fokin missing her/him
friend : *noticably sad*
me : look at you all sad & shit
friend : shut up!
me : just fokin missing her huh?
Word of the Day on September 15, 2026

endwarfins

The rush of neurotransmitters and neuropeptides triggered specifically by watching the Seven Dwarfs march home singing "Heigh-Ho" — that particular high of pickaxes, whistling while you work, and communal domestic bliss in a cottage built for men half your height.
I only meant to watch the Heigh-Ho scene for the endwarfins, and then it was two hours later and I'd watched the whole movie.

Endwarfins aren't just a Snow White thing — I get the same hit off the Lollipop Guild in Oz.
endwarfins by Howard Ogden September 13, 2026
Word of the Day on September 14, 2026
A slang term used to describe a bald person, typically someone who is completely bald or has a closely shaved head. The term is derived from the infamous, hairless kids’ cartoon character of the same name.
Example 1:
“Did you see that caillou over there? His head is reflecting the sun like a disco ball.”
Example 2:
“I think Dave is finally accepting his hair loss. He just went full caillou and shaved the whole thing off.”
caillou by WMH01 September 12, 2026
Word of the Day on September 13, 2026

Brought-upsy 

scruples; to have manners;

May also be spelt Brought-upsie

WestIndian/Caribbean in orient - Barbados, WHUT.
Example 1: Child, you ain't got no brought-upsy?

Translation: My Child, have you not any manners?



Example 2: What, you ain't got no brought-upsy?

Translation: I can't believe you're doing that. Were you not taught any manners as a child?
Brought-upsy by B-Town Gilly April 20, 2005
Word of the Day on September 12, 2026
The practice of modifying a model (not limited to toy action figures) to achieve some result other than that intended by the manufacturer. ...
I had to kitbash my Luke Skywalker figure with my Darth Vader figure because Luke was missing a hand.
kitbash by geru January 15, 2006
Word of the Day on September 11, 2026
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