Primarily in Military context. The state of becoming single after a period of time away from home, i.e deployment/IET training. Typically started by the soldier's significant other, in the act of finding someone else while they're gone.
Soldier 1: Dude, I just got Phase 9'd by that bitch.
Soldier 2: For real?
Soldier 1: Yeah man, not cool.
Soldier 2: For real?
Soldier 1: Yeah man, not cool.
by Charyn September 19, 2010