mumface 

Someone/thing who perpetrates/is (an act of) extreme annoyance.
Matthew Osman - Case in point.

Me: Hey, you spilled egg whites on the floor!

Osman: Yeah, and what are you going to do about it?

Me: you mumface! incidentally, i dislike you heartily. relocate yourself to a new locus.

mumface by Jizzle on My Shanizzles January 27, 2007

Momface 

A girl who's face has the distinct look of a mom. Momface can happen at any age and is not restricted to woman that have kids.

"I saw Sharron today and she is looking rough."

"Yeah, she's got Momface, hardcore."

Momface by karamilk February 9, 2010

Murface 

1. Basically, what the murface is, is the essence and expression on old people's angry faces when teenagers ride bikes, walk, defecate, etc. on their lawn.

1. Old man: "murr, you damn kids stay off my lawn! murrr mur mur, damn teenagers"

Teenager: "you suck old guy!"

Old man: "murrr!" >X(

2. what the murface looks like -> >X(

Murface by Anangryoldman June 21, 2009

Mutface 

Australian slang for a face with 'mut-like' features - 'mut' being colloquial for vagina.

"...get outta here ya smelly mutfaced fuck!"

Mutface by Brenton976 July 14, 2008

mugface 

1. An adjective to describe a person with mug-like features, or who has just done something which is clearly stupid.

"Oi, you, stop impersonating an ambulance. This is a Church. You Mugface."

mugface by Dave Kaboshi July 12, 2007

Mugface 

Comically ugly, Unfortunate in appearance, One which should generally be avoided.

You're a right mugface

Mugface by Miss GRP February 9, 2008

Momface 

Type of face characterized as resembling one's mother more so than one's father.

Lilith really has more of a momface than a dadface, don't you think?

Momface by Landfill503 May 20, 2010