Mum Face 

A person with a face like a mum or dinner lady; typically plain, old or generally unprepossessing.

Mum Face (n) or Mum Faced (adj) // Mom Faced (U.S)

Boy #1: That girl has a really hot body.

Boy #2: Yeah, but she's totally mum faced.

Mum Face by PeaHead October 22, 2013

Your mum's face

A term spawned from two previously immature and overused insults 'your mum' and 'your face'. Although these two retorts were originally used by the illiterate and mono-sylavic lesser-beings of british culture the combining of the two has only recently been adopted by somewhat higher brow citizens.

Although used gramatically in much the same fashion as both its parent phrases the use of 'Your mum's face' is generally accepted to be a satirical take on modern chav culture.

"Man this seat is comfy"
"your mum's face is comfy"

"Don't you think this ice cream is delicious"
"Your mum's face was delicious last night"

Your mum's face by Matt 'Verix' December 27, 2008

Facebook Mum 

When your mum gets a Facebook account and comments on everything you do.

Dave Says
'Yes, no exams means FREEDOM'
Dave's Mum Says:
'You can start on the chores then'
Dave's Mate:

'Dude, it hurts to have a Facebook Mum! Suck!'

Facebook Mum by Salazard May 19, 2009

Facebook Mum 

A "Facebook mum" is a middle-aged woman who constantly posts about their life and kids on Facebook. They have a group of friends who are also "Facebook mums" and drink wine together.
They always use emojis and always text hash tags like: #winetime #hardworkingmums #proudmum #mamabear
These are the emojis they always use: 🥰 😍 😘 🤗 🤪 💖 ❤️ 💋 🍷 🍾 🍻 🥳 😬 😜 🤯 🤒 😱 😓 😢
An example of how they talk online:
Hiya love ☺️🥰 free to have some wine time tonight with the girls? 🤪🍷❤️💖 #Friends4Ever #WineTime🍾
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Facebook mums are usually 35-60 years old.

Facebook Mum by rosepetalsx September 23, 2023

I facebooked your mum 

An insult thrown at someone to show them how much of a flirt their mum is thus probably making her a slut.

Dave: steve your retarded
Steve: I facebooked your mum

I facebooked your mum by SimpsonXL October 23, 2008

Facebook Mum 

A mum who posts/sends cringy and/or hypocritical Facebook and/or Instagram posts to friends/family.

Karen just sent another minion meme to me, what a Facebook Mum.

Facebook Mum by Comet! August 14, 2022

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