m-effer
A sneaky way to call someone's mom a cuss word without getting in trouble. It's like a secret handshake for jerks.
You said 'm-effer' during a school play. The teacher didn't notice.
Your dad used it in a text to your mom. She laughed and said 'I know who you're talking about.'
You whispered 'm-effer' to your friend during a test. He snorted and got caught.