Idiot, foolish. Australian slang. Example: You broke it! well, your're a dilbry aren' you. Hey dilbry! It's here. Have you got eyes or what? Where is it? Dilbry over there lost it ! If you think the police won't catch you then, you're a bloody dilbry.
DILBRY
Meaning of DILBRY in English
Slang English vocab. Английский сленговый словарь. 2012