Macinton
Macinton is when your mouth goes all wiggly and makes a loud pop sound like a fart in a telephone booth. You get mac attacks if you do it too much and too loud.
My homie just did a macinton so loud my dog ran out of the room.
I was eating a burrito and did a macinton so hard my face turned red.
My mom did a macinton during church and the pastor asked if the building was on fire.