An F11 may ocour when a select group of friends execute a night out of unheard proportions. The type of night out where stories will be told, heroes made and benchmarks for a generation set.
Besides mass amounts alcohol, there is often gambling, strippers and sheer disregard for personal safety associated with an F11 night.
The build up to an F11 can take months.
B: Yeah, we are going to Effeleven that shit.
A: What the fuck happened last night? I've woken up with 2 hookers, a dead dog and I have a tattoo on my dick..
B: Don't know mate - we fucking Effelevned it.
A: Did you hear about those guys? They blew 10k in one night out, I heard one of them actually had a heart attack..
B: That's so Effeleven.