M.O.S

Some one who is not related to you but is older mentally and is close enough to be your sister.

Sarah is My M.O.S

by Savage16 May 30, 2016

M.O.S

Stands for "Manual Orifice Sex". Describes when a man manually cuts a hole in someone and sticks his cock into the hole. This is the fastest way to get HIV.

Guy 1: "Hey dude, did you here about the one guy who killed that girl by M.O.S?"
Guy 2: "No dude I didn't, that is sick."
Guy 1: "Yah well at least he got HIV."

by CommanderEarlRaymondKingston December 20, 2018

M.O.S

Missing on Snapchat

Lara is M.O.S, she hasn't answered in 30 minutes.

by Kota422 May 13, 2020

M.O.S.H.

Money over snake hoes

fuck M.O.B. what it really is M.O.S.H.

by carlvskansas July 6, 2011

M.O.S.H

Moment of Spontaneous Homosexuality

Wow, you're really moshing it right now by not hitting on that girl you like.

by Ryan MCL June 20, 2005

M.O.S.S

Mind Over Stupid Shit

Guy #1: Yo this kid says he can beat your ass
Guy#2:Whatever I stay on my M.O.S.S shit them niggas don't phase me

by Edizzlefoshizzle June 18, 2009

M.O.S.H.

An AWESOME group in Billerica MA, That do CRAZY stuff!! like kick each other in the face. or jump out a van going 50. M.O.S.H. stands for MonkeysOnSeaHorses.

I wish I could be in M.O.S.H.

by JessieJackson March 2, 2009