When you have to fart and you have to clench your buttcheeks so you dont let loose, kinda like you slam on the brakes
by Bengay19 June 5, 2011
To have such extreme skidmarks in one's underwear or pants that he or she must have "slammed on brakes."
*Notices guy up ahead with skidmarks on his pants*
"Oh my God, dude, that guy must have really slammed on brakes!"
by GrumpyFox July 21, 2017