A man was walking around with a sword, stabbing multiple people. If one of them were strapped they wouldn't have been clapped. "Stay strapped or get clapped"!
A saying which means to carry a weapon/gun (being strapped) on one's person at all times or suffer the possibility of being a victim if SHTF (being shot/stabbed/killed = getting clapped)
Dont let yourself be a victim, stay strapped and you won't get clapped!
Bro 1: Yo did you see the news, some batshit crazy guy shot up a mall!
Though he seems like just a street poet and a rapper, he's academically strapped and knows his shit. He's college educated and went to graduate school at NYU.