A Raspberry Pattern
A Raspberry Pattern is when you make a loud, smelly fart sound with your mouth like you're trying to embarrass someone and fail at it.
My brother did a raspberry pattern in the middle of math class and got sent to the principal's office.
I did a raspberry pattern during the school play and the audience laughed so hard they fell out of their seats.
My mom did a raspberry pattern during a Zoom meeting and my dad had to leave the room.