Thanks, Abdullah. I was unfamiliar with the expression, so I looked it up in the Urban Dictionary. Your explanation makes a lot more sense!
Abdullah, I know a lot has changed since I joined our local in 1972.
Back then, it was nearly sacrilegious to cross a picket line without permission from the union. ( There were exceptions for emergency services. ) Those who did were called a name I won't post here. They were shunned by their peers.