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A great friend but you want to sound cool or you don't want to say his name. So you just yell that my boi, it also has become popular and many YouTubers have shirts that have that's my boi printed on it.
Guy 1: "That my boi "

Guy 2: "You already know"

"What that guy's name again," thinks guy 1

"His name is so long Iand hard to pronounce and I am never, trying to say it again," thinks guy 2.
My boi by DuOnlyWildWilly June 6, 2018
Word of the Day on December 8, 2019
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My Boi ; One Real Ass Nigga Or Female Who Just You Fuck With The Long Way
"That's My Boi HotDog Hotdog "
My Boi by Hottie Draco October 19, 2017
It means the don’t know what u mean or your wearing bad clothing
My boi where did you get those shoes
My boi by xBuddyneedshelp December 7, 2019

My boi Rancho 

Something u say when u talk about a friend of yours but you don’t want to reveal his name
So me and my boi rancho shoplifted so much that we were practically an expert at getting away with it.
My boi Rancho by YuOfTheNight April 1, 2019

shake my hand boi

shake my hand boy
person 1: is dat a new shirt bruv?
Person 2: Yer man
Person 1: SHAKE MY HAND BOI!
shake my hand boi by CG October 10, 2003

eat my beans boi

When you want a boi to eat ur beans
Todd: Hey Jimmy, eat my beans boi!
Jimmy: mmmmmmmmm tasty
Todd: thanks, i made em in my special body part
eat my beans boi by Fuckme69420 March 24, 2021

hopp off my rack boi 

it means get off me so when someones on you on fortnite you kill him and you say the sentence
oh someones on me bois , i got him hopp off my rack boi
More from Urban Dictionary

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

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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