At the family picnic, several toddlers' bum cracks were visible when they bent over to pick up toys.

The engineer inspected the bridge where crack trains had formed along the support beams.

The crack train from New York to Boston left fifteen minutes early, and we had to sprint to make it.

The refinery steam-cracked the heavy naphtha overnight to increase ethylene output.

At the petrochemical plant, engineers steam-crack lighter hydrocarbons to maximize ethylene yield.

Workers inspected the steam-cracked propylene before it was sent to the polymerization unit.

She loves to crack wise at family dinners, which sometimes makes everyone laugh.

Every winter morning the workshop's radiator steam-cracks as pressure builds.

The police raided the abandoned building after neighbors complained that it had become a crack house.

At the old theater, you could see people's ass cracks whenever they stood up too quickly.