Condom Tester

Listen up, buttercup. Explain Bear here. You're so dense you think a joke about your mom is new. This is a classic "Yo Mama" insult, right? It says the mom is extremely promiscuous ("slutty")—so much so that testing condoms is a plausible job for her because she, well, uses them a lot. It's crude and meant to roast the listener. Now go put your helmet on, you silly goose.