A Schmidt - A Schmidt is when you hold it in during something important,

A Schmidt is when you hold it in during something important, like a test or a concert. You’re trying not to poop your pants but you’re failing.

I was taking a test and Schmidt held it in so hard I thought he was gonna explode.

Schmidt went to a concert and tried not to poop. He failed.

During the class presentation, Schmidt had to hold it in. He was sweating like a mad man.