underbuddy 

An understudy, or assistant for your buddy. "Buddy", in this case, is usually an animal companion, i.e. a cat or dog.

Woman to man: I think we need an underbuddy, because the cat has been slacking off lately.

To a cat: Do you want a buddy?

underbuddy by javamonk December 11, 2003

underbunder 

British slang for Underwear.

Used when you are talking about someone you either don't like or you're best friends with them and you're just messing about.

Example:
"Omg, we can all see his fat underbunder from here, I am uncomfortable."

Example:
"Get your fat underbunder off that chair!"

Example:
"Please take you and your assed underbunder out of here."

underbunder by igorpleaseshutup November 9, 2020

enderbuddy 

an enderbuddy is your bestfriend! the one person who get’s you like nobody else, the one person you love the most. where you can be yourself without being judged. the one person in the world, you can trust and rely on. your bestfriend.

an enderbuddy is your bestfriend! the one person who get’s you like nobody else, the one person you love the most. where you can be yourself without being judged. the one person in the world, you can trust and rely on. your bestfriend.

enderbuddy by ilovefoodbaha August 6, 2021

underbusy 

Not busy enough

I’ve been feeling kinda underbusy lately

underbusy by graham.cracker June 17, 2022

Underdaddy

A postgraduate who preys upon undergraduates.

Watch out for the underdaddy in the club!

Underdaddy by Undermummy July 1, 2022