Used as a verb. To destroy something with the force of two Boeing 747's crashing into the country's two biggest skyscrapers.
B: Yo, I saw that bitch-slut girlfriend of yours cheating on you with Rolfo at the National Dry-humping/Freaking Dancer's Association of Long Island Formal.
C: STFU!!! I'm totally gonna nine-eleven her face!!
M: Yo, dude, I got totally wasted last night and I totally nine-elevened my car into a mailbox!
Y: Oh snap!