A very small penis
Everyone has a millimeter monster until puberty.
I heard that guy got dumped because of his millimeter monster.
I heard that guy got dumped because of his millimeter monster.
by JAC7272 April 28, 2014

by BekVicious December 18, 2009

A term used in in the Northwestern Pennsylvania region that is synonymous for a game of hide-and-seek.
Let's play a game of Keegan Monster! Steve, you go hide, and I will be Keegan Monster and come and find you.
by LeonardDavis November 24, 2020

When a female innocently lays her head in your lap, but your interest is in other things. Alas, the rise of the ear monster.
by tedomega July 7, 2010

The act of taking filling two shot glasses with alcohol, dumping them both in your mouth, and then holding the glasses over your eyes like goggles and making monster noises. Usually a residual amount of alcohol will actually pour into your eyes and your eyes turn bloodshot and burn and you'll start actually screaming. This is knows as "Full Monster".
Bro 1: Rawrrr I'm the shot monster!
(vodka splashes into eyes)
Bro 1: AHHHHHHHHHHHHHH! (Full Monster)
(vodka splashes into eyes)
Bro 1: AHHHHHHHHHHHHHH! (Full Monster)
by ShotMonster September 5, 2010

I had no time to eat lunch, so I had a bag of chips and 2 granola bars today like a true snack monster
by Whaler Jake November 13, 2014

by Lean Elizabeth II March 7, 2022
