What is Muck Fuck?
1.
When u fuck someone in poo.
person #1)I had the craziest muck fuck last night yo.
person #2)Ur a crazy bitch. I would never muck fuck a fuckin chick u fuck
2.
The act of fucking a man or woman who has been fucked and internally ejaculated into by no less than 3 previous parties in a 30 minute period.
"That bitch was a total muck fuck!"
or
"I's about to be gettin' meself into a serious muck fuck, Argghhh!"
See