Sleep Mouseing 

Falling asleep in front of the computer while moving the mouse.

I was so tired my boss caught me sleep mouseing.

Sleep Mouseing by bori5003 April 11, 2014

Mousing Around 

Verb: the act of fucking in Disneyland park grounds. (Can be extended to any Disney theme parks ie: Disney Sea, Disney World)

Example 1.
Girl: OMG there are so many people lined up outside the disabled toilets now.

Guy: Hahaha holy shit there is one in a hospital bed.

Girl: How did I let you convince me to even begin mousing around with me.

Guy: Doors open better run!

Example 2.
Guy: Come on babe let's mouse around.

Girl: OMG no!

Guy: I can take you to the happiest place on earth...

Mousing Around by tin_tinandcrew December 12, 2017

meat and mousing 

The act of simultaneously holding a mouse in one hand and your penis in the other, all of course while viewing internet porn.

Robert's mom caught him meat and mousing.

meat and mousing by AAIIEE September 28, 2008

mousting 

the act of jousting into someone's mouth with one's erect penis or a dildo

Betsy: "Janice, want to go mousting tonight?"
Janice: "Sure Betsy, let's go to the club and find some hunks to moust with"

mousting by MattBallea July 25, 2014

Mousing 

Using his thumb and index finger, a man first grasps his penis and testicles at the base. Using the opposite hand, he wraps the penis downward, over his index finger, and lightly grasps the tip with his middle or ring finger. With his free hand, he lightly dabs the side of his penis and testicles with a stamp pad, liberally inking both. Then he rotates his manhood 90 degrees, such that the testicles are vertical and the penis is on one side. Then he bursts forth towards his unsuspecting partner, stamping her as many times as possible before she can escape, leaving numerous Mickey Mouse silhouettes.

I surprised my girlfriend last night, I gave her a good mousing.

Mousing by BBaggins September 26, 2009

left hand mousing 

the act of masturbating while using the computer.
i.e. your right hand is occupied, so you must navigate with your left.

bob: "hey man, are we going drinking tonight?"
bill: "naw man, i have a left hand mousing date with CSL0938 from adultfriendfinder."

left hand mousing by Trent Schoneweis August 22, 2007

Mousing 

Any mischief or shenanigans by a person or group of people (usually teens/college kids.) Synonymous with booling.

Bro where did Tyler go?
I heard he’s mousing with Janessa behind the shed. 😳

Yo last night I went mousing with the boys.

No way what did u guys do?
We found a group of rockets and then took out some mailboxes.

Mousing by KMouse June 12, 2020