when someone randomly gets up and leaves for no apparent reason completely unnoticed by the rest of the group

getting drunk and pissing your pants while crashing on someone else's couch. thus destroying your phone at the same time "water damage."

alternatively, getting drunk and telling a girl you just met that you are in love with her, creeping her out, and destroying your chance with her.

Ignoring all of one's friends and then going to bed angrily.

When you're out with friends and suddenly disappear and are no where to be found

Expression used to describe the action of having an all nighter for school.
Preferably Asian kids pull an Ian