rat boi 

a character in a book (you wont know it) that is typically seen wearing a crown, holding a gun and occasionally smoking a cigar

omg look, its rat boi off to destroy another kingdom.

rat boi by raggedy ass November 14, 2021

Ratboi 

A teenager who emits an aura of obnoxiousness. Also typically picks fights and looses and always talks back to people of authority. Looks like a rodent.

I actually hate that ratboi in 3rd period. He's so stupid

Ratboi by Boitho October 8, 2017

Ratboi 

A ratboi is a type of player in Rainbow Six: Siege who will purposely choose recruit and use the M870 as their primary weapon. Ratboi can be used as a noun, and as an adjective.

I’m going ratboi this round guys.

Get ratboid you bitch-ass nigga.

FFFUUUUUUUCKK A FUCKING NAKED RATBOI, WEARING A SANTA HAT KILLED ME WITH A CANDY CANE AHHHH!!!!!

Ratboi by Soap O’Dope June 13, 2018

ratbois 

a group of three scottish girls who are absolutely mental.

“ratbois a huv tae rant”
“come for a mad sesh ratbois”
“go oan the ratbois group chat ya fannis”

ratbois by ladso6999 June 15, 2018