(merf) noun. acronym for Mom I'd Run From. The opposite of a MILF. A mom you definitely would not want to do.
"I don't know where she gets her good looks, her mom is a
MIRF!"

"Your momma's so ugly she's not a MILF she's a MIRF!"
by pose2pose October 30, 2006
(merf) noun. acronym for Mom I'd Run From. The opposite of a MILF. A mom you definitely would not want to do.
"I don't know where she gets her good looks, her mom is a
MIRF!"

"Your momma's so ugly she's not a MILF she's a MIRF!"
by pose2pose September 17, 2006
Mother I'd Run From
Dude, check out that MIRF. Fuck, here she comes!
by Anonymous user 123245434454353 January 19, 2009
Mother I'd Resort to F*cking. To be used in a situation where you wouldn't necessarily LOVE to bang this chick, but you wouldn't entirely dismiss the notion. Usually a single parent co-worker with 1-2 children, who never stop talking about their kids while you're thinking "...eh i'd plug this chick."
Female: "..so OMG, the other day, in quilting class, we started using pink fabric and OMG it was so cute you should have seen {insert child's name} he/she LOVED it!"
Male: *Thinking* 'I probably would stick it to this person. I wouldn't quite give her MILF status, but I'm willing to go MIRF'
Male: *speaking* "oh no shit, that's awesome"
by millz207 March 2, 2015
Asian equivalent of MILF. Mom I'd Rike To Fuck.
Oh man, Hiro's mom is fucking fine...I'd rike to fuck that long time! What a MIRF!
by James in Raleigh November 10, 2008
Mother I Reckons Fugly :) Its not mother i would run from thats just stupid !
e.g Holy shit thats definatly a MIRF !

e.g Did that MIRF get hit by a train or a bus ?

by Bree & Jake - Nerds March 8, 2009