When in an attempt to hold on a fart while in a classroom (preferably during reading, tests, or other times when the classroom is relatively silent) the pressure between the butt cheeks increases vibration- effectively making the noise louder. A shocked expression is a sign of a class blast, while pure embarrassment is a sign of just a regular fart.
Student #1: "Yo, this dude let out a class blast right as the room got quiet in 6th period today! His face was the best part.
Student #2: "I feel bad for him, all he wanted to to was hold it in, tie he fucked himsekf over. Still funny as shit though!"
Student #2: "I feel bad for him, all he wanted to to was hold it in, tie he fucked himsekf over. Still funny as shit though!"
by IcyKnight December 1, 2016
The lowest class of anything, that the world has to offer. (Can be applied to economic and social structures)
by skotobasilio February 5, 2009