under gunder

when your partner shoves a end of a guard rail up your ass while making monkey noises

that new under gunder thing feels kinda weird.

by EEEFIN February 14, 2022

The gunder from down under

awesome people with a big penis and should be looked up to because they are legit

The gunder from down under

*Wow Elijah GUNDERsen is frciken awesome I wish I was him*

by ThunderGunder5000 March 6, 2017

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."

by igorpleaseshutup November 9, 2020