A person who is streetstupid is someone who unaware of urban trends, ignorant to societal norms, and is not streetsmart.
A says: Can I have a... whats that drink called...? Flaming... ferrari?
Bartender: Do you mean a flaming lamborghini?
B (friend) says: Are you streetstupid?
Streetstupid: The opposite of streetsmart—someone who has little awareness of dangers in of urban environments, makes reckless decisions, and risks their safety or others’ by failing to navigate the modern world wisely.
Example: He tried to disarm a man wielding a knife and got stabbed—that was a very streetstupid move.
Lee: Bruv, did you hear about those lads at work? They went to Thailand and got robbed of all their holiday money—they were skint the whole holiday.
Frank: That’s just proper streetstupid.
Lee: Init, bruv. LOL.
Frank: LOL.