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1.
An emergency, in which you require immediate, simultaneous oral sex.
Alex: I had the shittiest day today. Geez, 6911!
by nicolenitrous March 29, 2009
 
2.
when two people are 69ing while being fucked in the ass bytwo other people resembling the wtc

my girlfriend and were bored last night so i called up my friend and told him to bring his girl over so we could rock a 69-11
by nealon April 22, 2007
 
3.
Sixtynine eleven is the described shape of a love making act between two men giving simultaneous felatio. Two men sixtynining, the eleven is from their penis'. A homosexual version of a sixty nine.
Billy: "What're those two naked guys doing over there? Wrestling around?"

Johnathon: "If they've got each others boners in their mouths, I think you'd call that a 6911!"
by gordtron December 08, 2012