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I jus made some cupcakes... when I frost them, they'll become mupcakes.
Mupcake by Katie Marie Bell July 3, 2012
A mudcake is an action while during intercourse the male proceeds to drop a steaming hot dump on the females stomach and then ejaculates onto it to imitate putting icing on a cake.
Person 1: Dude I made a fat MudCake on my girls back yesterday

Person 2: Yooo that's actually insane!
MudCake by Long Dong Big Wong December 22, 2019

Chocolate MudCake 

you and your lover have almost finished some hardcore sex, so you pull out, take a shit on their chest stomach then ejaculate on the shit like you were putting mustard on a hotdog, then you or your lover eat the faeces.
John-Boy: Hey how was your night?

Mandy: Ah it was alright, I can still taste the chocolate mudcake though.

John-Boy: ....

Strawberry Mudcake

Punching a person in their nose, then taking a dump on their face
"This bitch used her teeth on me, so I gave her a strawberry mudcake!"

Origin North Shore, Sydney
Strawberry Mudcake by Dirty Fkr April 17, 2009

frosted mudcake 

A poo covered in cum after anal sex.
Thanks, I'll be passing frosted mudcakes all week!
frosted mudcake by sjc13 September 12, 2013

Salty Mudcake 

When you masturbate whilst on the toilet and faeces and semen leave your body at the same time.
Callum got bored at work so he went to the toilet and knocked out a Salty Mudcake