M/O

Is short for months old.

My baby is 5 m/o.

by Emkiz January 22, 2018

pineapple jack o lantern

a jack o lantern, but pineapple. why?

"did you see jake? that madman has a pineapple jack o lantern instead of a pumpkin, what a Weirdo" he says knowing full well he has a watermelon jack o lantern.

by VoidPineapple August 17, 2021

lame-o

Noun: One who fails to recognize the credibility inherent in one's excuses for not hanging out.

Mat: I haven't been around because I work a lot and live an hour away from you. Not to mention, I dont have a car.

Jamie Leigh: Those are poor excuses. You are ugly and suck.

Mat: Dude, you're a lame-o.

by feralmat February 11, 2010

O

O is literally just oh but without an h and I'm bored af in quarantine

Person1: dude i have bad news
Person2: did the police caught you selling drugs?
Person1: no, my dad passed away
Person2: o...

by AmIHuman August 1, 2020

O₂

Another word for Oxygen

O₂ room is a place in the Skeld map in Among Us.

by Ahadi2011 August 16, 2025

o

o

o

by HOBITY JOBITY December 2, 2020

lil o

A nickname for Amari D. Middleton (better known as: OsamaSon)

dude #1: who you is
dude #2: im lil o
dude #1: oh shit, i fuck with you heavy lil o

by graveeeee June 28, 2025