Macinton - Macinton is when your mouth makes a pop like a balloon burst

Macinton is when your mouth makes a pop like a balloon burst. If you do it too much, you might end up with a mac face for life.

I did a macinton during a test and got a zero for being too loud.

My sister did a macinton during a movie and I had to restart the whole thing.

My teacher did a macinton during class and the kids started laughing for the rest of the day.