When the girl in doing a handstand sucking your dick, and you're standing up eating out her pussy and/or anus hole.
Resembles 69.
Guy 1: Yo man, my girlfriend was sucking my dick yesterday, WHILE DOING A HANDSTAND!
Guy 2: Were you eating her out?
Guy 1: Yeah.
Guy 2: Shit man! You just did an 11 with her!
The most efficient use of expressing laughter in chat messages. Originally used only by Age of Empires II players, but it is now widely accepted (in their minds).
Sources:
"11 Equals 'lol'
111 Equals 'lmao'
1111 Equals 'LMAO'
11111 Equals 'OMG lol lol' 111111 Equals.. whatever you want it to be, for intstance: 'LOL ROFL LMAO WTF 11' "
- T90Official, Age of Empires II YouTuber
"11, Synonymous in use to terms such as "lol" or "kek", a reference to an audio taunt in the 1999 video game Age of Empires II with the purpose of expressing laughter or amusement."
Source: AoE2 Reddit user Hjoerleif
"11 Is a taunt from Age of Empires 2 that, when used in chat, plays an audio clip of someone laughing. It's basically lol before lol or the lol of Age of Empires 2 and all of it's players. 11"
Source: AoE2 Reddit user dimanor3
"Use 11 in ... professional conversation
Employer: before we begin this job interview, (tells joke).
Applicant: eleven.
Employer: eleven."
"Did you know that in the first Alpha Build (00.0503.0706) of Age of Empires 2, fishes icon were represented by a photo of Ian Fischer Lead Designer of the game. 11 11 11 😂😂"