Mashin 

the act of having as good of a time as you would while eating mashed potatoes

M: this is a really fun party
S: yeah it's really mashin!!

Mashin by Glittergirl March 29, 2017

mashin 

Mashin is a word used to descibe beating some one up very badly. Or also can be used as insultin someone very badly.

Example = Man I seen you at the club the other night straight mashin on that mutha.
Meaning: I saw you at the club the seriously beating someone up.

mashin by Dazzle June 11, 2006

Mashin 

A term used in the East Midlands to describe making/brewing a pot of tea.

"I've got rate dry mouth, are you mashin midduk?"

Mashin by Norris "The Nose" Nostrell February 5, 2021

mashin' 

1.used to describe the act of traveling at excessive speeds in a motor vehicle

2. utilizing a lifted vehicle or 4 wheel drive to traverse over obsticals

man last night i was out in the car phuqqin mashin' like no other.

mashin' by Clay VO January 27, 2004

Mashin' 

The art of pushing someone's intestines in with ones ham piece, may need to use ones thumb to push the head in! Also known as breaking it off in ones butthole.

Billy bob was mashin' it last night!

Mashin' by CarolBaskinsABeatch! April 16, 2020

mashin' dinner

to egage in anal sex with a woman.

Liz got drunk last night, I wound up mashin' dinner.

mashin' dinner by PaulPizzle November 4, 2007

mashin' on the b button 

When a girl is shakin' it so hard u afraid it gonna fall off

That girl was shakin' it so hard i afraid it gonna fall off; she mashin' on the b button

mashin' on the b button by whycantIusesomeoneelsespseudoy October 5, 2011