"You guys are mun!"
"We are not mun! You're mun!"
"We are not mun! You're mun!"
by One Eyed Milkman May 4, 2004

by Cap'n Bullmoose April 20, 2005

Short for Model United Nations, or Model UN. One of the worst clubs to join in highschool, very cult-like, would not recommend…
by mshahonlydubs April 1, 2023

by mihailopupovac November 24, 2022

From Sydney Church of England Grammar School SHORE
meaning 'as if', if a person is lying then you could say mun, as in that person is being a bit of dick and making shit up
meaning 'as if', if a person is lying then you could say mun, as in that person is being a bit of dick and making shit up
by lilwhitey December 1, 2010
