To perform the act of anal sex on a woman. To fuck a girl in the ass.
Last night i was mashing up a girl's dinner and i got shit on my dick!
by patyouth711 July 18, 2009
mugGet the mashing up a girl's dinnermug.

mash it up nah

A trinidadian phrase to usually said AFTER some one comes close to breaking something,it is a form of sarcasm.
person 1) knocks over appliance

Person 2) well mash it up nah.....
by bronte91 January 31, 2009
mugGet the mash it up nahmug.

Mash you up

To have sex with someone with great force and power
Yeah that Lucy I’d mash her up
I’d Mash you up
by Mayson Wordsworth October 13, 2018
mugGet the Mash you upmug.

Mashed Up Monkey

Put a banana in a sock, mash it up and put it in microwave for 20seconds. When done put it over your penis and start masturbating.
(20 secs only so you dont burn your knob)
I'm going yo get home and have a mashed up monkey
by No muff to tuff for buff May 05, 2022
mugGet the Mashed Up Monkeymug.

Mash up

I look I’m tryna mash up and mash out nothin else labih!
by Tha$lickest April 11, 2018
mugGet the Mash upmug.

Mashed up Dundee cake

The disastrous results of shitting yourself and seeing what the contents of your undergarments look like
Egad I've got 3 and 3/4 lbs of mashed up Dundee cake in the seat of my pants right now
by Mon nom de plume est Satre August 26, 2016
mugGet the Mashed up Dundee cakemug.

mash up

"A mash up". Someone who is insane, crazy, or just not quite there.
by jduk23 January 10, 2008
mugGet the mash upmug.