fail a test Share definition Flag to fail a test is synonymous with blazing a spliff.to go blaze a spliff means to go "fail a test" person 1: haha yo do you wanna go fail a test ? person 2: yeaaa fail a test by jimmyeatskids October 12, 2009 0 0 Get merch Get the fail a test mug. Buy Now — $32.95 See more merch