License plate tabs that are very old and expired. Most people's sour tabs are over a month expired because they are too broke to afford new ones.
Duder 1: "Fuck dude I got a ticket today."
Duder 2: "For what?"
Duder 1: "My tabs. They expired last month."
Duder 2: "Damn dude! Those are some sour tabs. I been telling you to get them shits for weeks now."