A 9/11 is a sex act in which a man violently and unexpectedly inserts his penis into the anus of his sex partner. This may occur during or outside consensual intercourse.
When I asked Maria why she broke up with Stanley, she said that he gave her a 9/11 after a night of drinking.
by FetusDestroyer June 17, 2012
A synonym for "hahahaha" or "lol". 9/11 = .8181818181, and since "H" is the 8th letter of the alphabet and "A" is the 1st, 9/11 = "hahahahaha".
Bro: Shawn Johnson can be cute sometimes but other times looks like a dude that got his face teabagged 24/7 in the gobi desert.

Dude: 9/11!!!!!!!
by 4rch August 16, 2008
when god played jenga by himself and failed horribly after 2 turns
god - okkkayy.......... *crash* SHITTTT

this example includes "9/11" as requested by urbandictionary
by Hawaiian Dicking May 08, 2009
9/11 is the day that a horrible tragedy struck America.
Hey Tina did you see the news today?
yeah i will never forget 9/11
by fairygoddess2221 September 16, 2005
C'mon guys, it happened in FUCKING 2001. I think it's okay to make jokes about it now.
you guys should get those poles surgically removed out of your asses if they've been there for 9 years.

9/11 is funny.
by Imgonnagetsomuchhatemail4this September 28, 2010
MMM-MMMM-MMMM-MMMMMULTIKILLLLLLL
Server: WTT 9/11
Taliban has pwned World Trade Center with Boeing 747
MMM-MMMM-MMMM-MMMMMULTIKILLLLLLLL
by Rhymo May 31, 2009
HAHAHAHAHA.
Where A=1, B=2, C=3 ... H=8, etc etc.
9/11 = 0.8181818181
= HAHAHAHAHA
by Marencian September 03, 2008
Forget the fucking terrorist attacks! Setember 11 is my birthday, and I'll be damned that little thing gets in the way of my time of the year. Quit the mourning and celebrate me you fuckers!
Do you really think I give a shit about a city that lost only about .00017 of its total population?
by Another Asshole May 31, 2005
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