Cardboard crack refers to scratch-off lottery tickets. Especially to those who can't go to the gas station without buying a handfull of tickets and promptly redeem each two dollar winner so they can buy more cardboard crack.
My buddy is addicted, he can't go one day without scratching his cardboard crack.
air crack is when out of no were everything is funny and you laugh uncontrolably untill you fall over
you feel as though you just did 6 lines
brittany-hahaha omg, BALLS!! hahaha
jeff-haha i think brits on air crack
ashley-whats that
brittany-HAHA!! WHATS THAT omg!! haha *she then falls in to traffic*