by Wompa One July 12, 2006
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!!!!!!!
Dude: 9/11!!!!!!!
by 4rch August 16, 2008
by IMJesus775 April 01, 2018
The best holyday in the entire world.
by Not Clay December 05, 2020
The day in 2001 that a major tourist attraction in New York City suddenly became a major terrorist attraction, which later became a major tourist attraction. Washington, DC, was also affected by this phenomenon, but to a lesser extent.
by Nudnikdude September 05, 2015
by IcyBlueSkullYT September 09, 2019
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