Staying up for almost all night, usually to about 5:00am. A teenage (age 12- 14) form of an all nighter that is cut short, as to not be caught by your parents.
Geek1: What happened? You just logged off in the middle of the quest in the MMO!
Geek2: Sorry, but I was pulling an almost all nighter. If my parents saw me I'd be dead right now.
As A Matter Of Fact.
AAMOFly - As A Matter Of Factly
Used when being a smart ass. Mostly used when txting or over the internet.
guy1: "wow, no one has my name, lol"
guy2: "I know 20 Brians AAMOF"
guy1: "STFU fag"