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Homecoming king who gets concussed and doesn't come to school for 4 weeks (perhaps more), older women love him
Is that 18 year old dating a 42 year old woman?
Yeah, he's such a Gillis.
Gillis by mnhockeyfan October 16, 2019
sam(aka freetard) is a gillis. also called SG(super gillis)
sam: whats a gillis?
jared: your a gillis
me: ZING!
gillis by noha December 15, 2008
Gillis is a good man.
He's a wonderful husband and father and will spend the rest of his life loving his sweet baby chell ❤
Gillis 💘 chell
To infinity and beyond
Forever and always
Gillis by Twistedbud May 7, 2023

Gillis goggles 

Phenomenon in which one's consumption of alcohol makes physically unattractive persons appear beautiful. Gillis goggles is a more intense and severe version of the classic "beer goggle" phase. While "wearing" gillis goggles, literally anyone/anything is fair game.
Ross: "Dude what the FUCK were you thinking last night when you were dancing with that fat chick??"

Matt: "fuck you, she was pretty hot"

Ross: "no dude you just had a bad case of the gillis goggles again."
Gillis goggles by GOOD TIMES IN LA PAZ September 12, 2010

Gillis-Graduation-Gobbler 

A name for a woman that got too hands at a graduation party.
Dude hide, it's the Gillis-Graduation-Gobbler

Oh no! I'm next!

the gillis principle

The Gillis Principle outlines the proportionality between the amounts of mountain dew and marijuana that would kill an average human.

Mathematically, 1 Gillis (Gi) is the unit of either substance (Marijuana or Mountain Dew) that would kill a human when consumed within an hour. Both substances have calculated conversion rates based on experimental data.

Mountain Dew: 8823mg Caffeine = ~173 cans = 61L = 1Gi/Hour
Marijuana: 68000g THC = 971 000 Joints = 1Gi/Hour

It can be concluded using the Gillis Principle that Mountain Dew has a far higher lethality rate than Marijuana.
Friend 1: "Hey, did you hear? Jared smoked himself to death last night."
Friend 2: "Yeah that must've been a Gillis-ton of weed!"
Friend 1: "Using the Gillis Principle, that was like 971 000 Joints."
the gillis principle by PolChan December 6, 2014
More from Urban Dictionary

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026
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