mopstick 

A thirty round magazine for a semi automatic handgun

We bringing them mopsticks out to shoot up they block!

mopstick by Dontel21 March 30, 2016

moopsie 

A nickname for your favorite kitten out of a litter of kittens.

My favorite kitten is Flarna. She's my little moopsie!

moopsie by queendenise June 11, 2009

mopsession

1.The act of challenging an adversary to mop combat, and threatening to mop the floor with them, thus humiliating them in battle.

ex.
Person #1: "I challenge you to a mopsession, you ready?"
Person #2: "Your mop ain't worth my time!"

mopsession by OBeast_ July 5, 2010

Moops 

Misprinted word in Trivial Pursuit of Seinfeld which is actually Moors. Because of this, the Moors is now sometimes referred to as the Moops.

It's not the Moors, it's the Moops!

Moops by Pang Mu April 8, 2003

MBoss

The act of shaking that ass up and down on the street(slang term for twerking)

Johnny: Damn, look at dat ass
Timmy: WOW. Mami sure knows how to MBoss

MBoss by dummythicc42069 April 10, 2020

Mopsick 

A state of extreme baldness by choice. To have what is considered a "mopsick head," one must shave his head completely and occasionally shine it.

Steve: What happened to all his hair?
Mitch: He's mopsick now.

Mopsick by xfornl December 9, 2010

"The Card Says Moops" Maneuver 

A form of logically fallacious reasoning that involves winning an argument by taking a contrarian position that is left just vague enough to where they win the argument regardless of which side comes out on top.

Named after the famous scene from the Seinfeld episode "The Bubble Boy."

There's a certain beat-you-at-your-own-gameiness to "The Card Says Moops" Maneuver. "Safe spaces are bullshit, but if you get one I get one, too." "There's no such thing as systemic oppression, but if there were, I'd be oppressed." It's dismissing the rhetoric of social justice while also trying to use it against you. Claiming "the card says 'Moops'" does not so much mean "I believe the people who invaded Spain in the 8th century were literally called 'The Moops'," but rather "you can't prove I don't believe it." Not a statement of sincere belief; simply moving a piece across the board. All in the game, yo.
-- Innuendo Studios, "The Alt-Right Playbook: The Card Says Moops"

"The Card Says Moops" Maneuver by The Logical Fallacy February 3, 2019