|1.||heard you wouldn't|
when a challenging situation is presented, the phrase is used to provoke a person to attempt the challenge. Also used to taunt or encourage to fail.
Origin: Said when opposing team shoots a 3 point shot at high school basketball games.
person 1: What if i shot a firework at my moms car?
person 2: Dude, heard you wouldn't
(Can also be used in different cases such as: heard you couldn't, heard he wouldn't, etc...)