When you can see an inch of crack above someone's thong sticking out of her pants and it looks like their thong is getting ready to torpedo itself into their ass.
The woman at the pool has a crack missile sticking out of her shorts.
The fried chicken place in the gas station was really busy today, it must be a crack moon tonight. I hope I have some beer in the fridge because there isn't a chance in hell I'm stepping foot in the liquor store today.