What is Batman Drunk?
1.
Being intoxicated by alcohol to such an extent that you pull an article of clothing (shirt or skirt, usually) over your head and pretend you're Batman. Term was coined in an episode of Two-And-A-Half Men.
"While Jim was batman drunk he stretched out of the collar of his shirt."
2.
The level of total drunkiness where a person does totally stupid things that they would not normally do (i.e. act like batman)
Person 1: Dude, I drank a ton last night. How bad did I get.
Person 2: Dude, you were batman drunk
See