Bum in Argentinian slang. Also means someone that resembles a bum.... badly dressed... bad grammar, etc.
You look like a groncho wearing a Barnum & Bailey Circus t-shirt.
by Anouk September 18, 2005
Argentine slang - a derogative term for someone demonstrating "low class" behavior.
He just skipped out on paying the bill, what a groncho!
by Dr. HS Thompson April 14, 2011

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