bizarro, adj. — Green’s Dictionary of Slang

bizarro adj.

[SE bizarre + -o sfx (5), but note Bizarro, a character in Superman comics]

(US teen) weird, eccentric.

1971		Current Sl. VI 5: Go bizarro, v. To lose one’s composure; to be driven insane.
1973		L. Bangs in Psychotic Reactions (1988) 122: The bizarro lushed-up Irish scrubwoman Kitty McShane.
1989		D. Waters Heathers [film script] This wouldn’t be that bizarro thing you were babbling about over the phone last night, would it?
1995		J. Stahl Permanent Midnight 357: Jackie Charge, a bit of bizarro theater I’d written.
2009		T. Black Gutted 28: ‘That tip-off you got last night?’ ‘Bizarro — guy on the scene.’ ‘Yeah...that was me’.