Fricked Your Mother

Listen up, smarty-pants! The joke is all about dropping a savage insult bomb. One dude tells another to go fool around with a cow (real nice, right?). But BAM! The other dude comes back with "I already fricked your mother," which is a mega-burn because it means he's saying he slept with the dude's mom. It's a low blow, but that's what makes it a roast!