muck face 

A reference to describe someone who's got a hot body but also has an ugly face, or if the first thing you notice is their ugly face. This cover the whole scale of uglyness, a less refined man/or woman may find a muck face attractive.

Pete: That chick playing pool is a hootie!

Gary: No way she's got terrible muck face.

Pete: Look at her body man?

Gary: True but I can't look at her face for too long, and your just desperate!

Pete: Your right, but that's why they invented doggy style! Alright!

muck face by speefer madness October 23, 2006

Blow the Muck on her face 

Irish for ejaculating your "load", which contains semen and sperm, all over a sluts face, and hopefully she will have the common decency to fuck off afterwards.
A common practice in Ireland usually without the slut fucking off as they want more muck.

" jasus would ya look at that whooer!" said a Fat ugly Irish man
" She deserves the muck" said his even fatter girlfriend
"BLow the Muck on her face" said the fat ugly Irish man with a grin on his face
" No thats my dinner" said the irish model (Fat woman)

Blow the Muck on her face by Muckeroo July 23, 2010

muckface 

The male version of duckface

did you check out dude's new facebook pic? Total muckface.

muckface by J.L.Lee October 20, 2011