Someone that is stupid or is acting stupid.
As I am trying to make a rental car arrangement my Dad is constantly talking and I can't hear the person on the phone. My grandpa* says to my dad, "Hey, stupo shut up"...

*He's from Connecticut, maybe it's a northern saying?
by backbayhiker December 27, 2007
stupo some one stupider den stupid
for example hovana i a stupo ho
by tai-ho April 28, 2005

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