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To sneak quietly somewhere, in order to eavesdrop or to steal something quietly.
Nate got caught mousin' at the door to the girls locker room, boy they were sure mad.
mousin' by The Real Ariana Grande December 3, 2018
Words you can keep
Pronunciation:
\ˈmə-zən\
1 a: a child of one's aunt or uncle on your mothers side b: a relative descended from one's grandparent or more remote ancestor by two or more steps and in a different line on the mothers side.
"I have 2 mousin's and one fousin." = I have 2 cousin's on my moms side and one cousin on my fathers side.
Mousin by Roham April 23, 2009
Related Words
I went to visit my Mousin
Mousin by cattyrsa December 13, 2018

mousin out 

to hang around the house and eat cheese; as opposed to going out, partying, etc.
John: “Hey are you coming to the Hideout”
Me: “nah I’m just mousin out ‘round the house”
mousin out by Slimy Bones Man May 29, 2018

Mickey Mousin' 

To have an erection so incredibly large in public that you need to excuse yourself to the restroom.
Jim: Excuse me fellas, I gotta go to the bathroom cuz I'm Mickey Mousin' over here!
Phil: TMI, Jim...
Mickey Mousin' by DatGTA5Addict February 8, 2022

Mickey Mousin' 

(similar to daffyducking ) When you are giving a girl oral sex and you then take a rodent, preferably a mouse, and push it into the said girl's vaginal tunnel. This then causes severe orgasms.
Dum ass dude 1 : Yo, me and my girl were daffyducking last night
Dum ass dude 2 : That aint got nothin' on me and my girl, we went mickey mousin'

mosin-nagant 

The Mosin-nagant is an old school bolt action rifle from Russia. Originally designed by a drunk Russian engineer and an even more drunk Belgian gunsmith, who drew up blueprints on napkins in the back of a pub somewhere in Siberia in a vodka-induced stupor. The Mosin-nagant fires the 7.62x54r cartridge, which can kill a polar bear at a thousand yards and keep going right through the tree he was standing in front of. The Mosin-nagant was used by the Russians in both world wars, so it's killed more Germans than collisions on the autobahn and under-cooked sauerkraut combined. Surplus Mosins can be found at gunshops in the States for like a hundred bucks on sale, and ammo is cheap surplus, so this is what real men shoot who don't want to drop $1299.99 on an AR-15 which fires a .22 round and that's made out of recycled milk jugs and Legos. Many of them come with a bayonet that's roughly the size of the sword William Wallace used in Braveheart. In the absence of gun oil, you can clean a Mosin by pissing down the barrel and wiping the bolt off with a dirty rag that you found on the floor in a Grease Monkey. Try that with a rifle that was designed less than 50 years ago.
Joe: " I need a rifle that is ten feet long and fires anti-tank rounds, but Ive only got 200 dollars!"

Ivan: "Amerikan comrade, you need mosin-nagant . Spend 100 on the rifle, fifty on case of ammo, use rest for vodka!"

In Soviet Russia, rifle fire you!!!
More from Urban Dictionary
Acronym, meaning Too Long Didn't Understand
Similar to TLDR
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.

Me: Woah! TLDU!
TLDU by L-Evans January 14, 2019
Word of the Day on August 30, 2026
the act of having anonymous sexual encounters with other men in public toilets.
Cottaging by greeef April 24, 2003
Word of the Day on August 29, 2026

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026

age gate 

An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"

Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
age gate by Banja January 7, 2011
Word of the Day on August 27, 2026

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
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