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1.
Mother I'd Like to Fuck In the Ass; a hot older woman or cougar with a delectable butt
She was probably about 40 years old or so, but she had a fantastic ass - she was a real MILFIA!
by PMax January 30, 2009
 
2.
An organization of MILFs who control the whole neighborhood, demanding "protection payments" like free babysitting, yard work and sex.
I stay away from the Laurel Heights Starbucks; that place is run by the Milfia.

That whole carpool racket is run by the Milfia.
by Lady Roses June 03, 2009
 
3.
Mom I'd like to fuck in the ass.

MILFs that travel in packs. Plural of the word MILF
Most likely the mom who is just a little bit too cool for her children's comfort. The type of mom who would loan her daughter a G-string and massage oil. The mom who sings "Baby got back" at karaoke while booty shaking to the beat. She knows all the words to "Maneater" by Hall and Oates, and one look at her tells you she is one. The type of mom who upon meeting her goes right into your spankbank whether you are dating her daughter or not.
Dude...you mom is straight up MILFIA...between her and her friends I killed a whole box of tissues last night.
by Shane C Gray February 03, 2011