(transitive, informal) To pack or fill very tightly.

(informal) Packed or filled tightly.

simple past tense and past participle of jam-pack

Alternative form of rocket pack

(aviation) A jet pack using a rocket engine.

(aviation) A piece of equipment that may be strapped to a person’s back and generate vertical thrust by a downward discharge of jet fluid, thereby rendering the person capable of flight.

simple past tense and past participle of vacuum-pack

Packed in an airtight container in a partial vacuum.

plural of six-pack

A collection of six of something bundled together, especially six cans. / (bodybuilding) A highly developed set of abdominal muscles.