Kid #1-Dude, I fucked that big-titted blonde MILF Donna! She is a total freak in bed, dude!
Kid #2-Dude, that's my mom.

mothers, whether married, separated or divorced, that a male individual sees as physical attractive enough to want to have sexual intercourse with them. Just cuz their moms doesn't mean that they don't need a spark in their love life. If they've ever breastfed,they have really responsive nipples and a core of erectile tissue in their breasts. The ones in good shape have worked at regaining control over their vaginas (Kegel exercises).MILFs are usually real careful about birth control, they know accidents happen but they take responsible steps. They want to fuck with abandon, with no romantic complications for their under-19 family.
A MILF is any mother that is sexually desirable.

Dude... Cassandra's mom is a milf! MILF! MILF! MILF!

"Dude, what's a MILF?"
"M-I-L-F, Mom I'd like to fuck!"
or
"Woah, Johnny, your mom's a MILF!"

Dood... Did you see that MILF walk out of Toys 'R' Us?

When you're going out to basketball practice and you see ur best friend's mother bending over to pick some flowers and she's got a thong on Got MILF?

"My friends mom Darlene" is one hot ass MILF!"

Stacy's mom- because she's got it going on.
Refer to music video.