nutbar
person:what do you think if i went to the gig in this? other person:i'd think you were a nutbar it'd get trashed in seconds
when someone is acting really out of character, does something you don't agree with or is in serious danger of looking like a prat, you call them a nutbar
"person:what do you think if i went to the gig in this? other person:i'd think you were a nutbar it'd get trashed in seconds" What is the definition of "nutbar"?