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8.
MEF
Mother Everyone's Fucked. Derived from the example of MILF as noted in the classic movie, "American Pie". This term is used for a female who use to be a slut, but then settles down, gets married and has a kid.
"Damn, I ran into Jen today and found out that she's married and had a baby. You remember Jen don't you?? What a MEF!"
by KiKKi January 14, 2006
 
9.
mef
to do something half assed
coined by mathias aka teethi13. IM him.
you just pulled a mef
by cambray January 03, 2004
 
10.
mef
an insult to someone who takes bout themselves or something that belongs to them
Suzy:omg i got these awesome jeans at the mall i look so sexy wit them!!
Marty: ur such a mef!
by TINA March 02, 2005
 
11.
mef
Male Ejaculation Fluid.
eew, you got mef on your sheets.
by Cxiara April 30, 2005