Successfully
drunk is when you meet someone who is at the stage of
drunk that they has lost her inhibitions and so will sleep with you but not
drunk enough that they are throwing up and doesn't know what they're doing. Best kind of drunk.
Me - hey
man did you bang that girl last night?
My mate - yeah man she was successfully
drunk, it was awesome.
or
Me - did you get any last night?
Mate - no he wasn't successfully
drunk enough