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1.
(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 29, 2006
 
2.
(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 16, 2006
 
3.
Mother I'd Run From
Dude, check out that MIRF. Fuck, here she comes!
by Anonymous user 123245434454353 January 18, 2009
 
4.
Abbreviation of the town of Mirfield, situated in West Yorkshire, England.
Boy 1: Gonna go out in Mirf tonight?

Boy 2: Fuck owt else to do.
by kermitthetoad December 02, 2009
 
5.
a wedgie that goes very deep. Also, a type of hole.
Dude, I got a huge mirf!
Don't let Char into my mirf hole!
by Mirf Char January 05, 2011
 
6.
Mothers I Refuse to F*ck.
Although Amir claims to have the hottest wife on the planet, to me she is nothing but a M.I.R.F.
by THe MILF hunter June 17, 2013
 
7.
Guy 1: Oh herro dis my mom
Guy 2: MIRF
by Aznpryde1123 November 13, 2008