(informal) Packed or filled tightly.

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

simple past tense and past participle of jam-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.

Packed in an airtight container in a partial vacuum.

simple past tense and past participle of vacuum-pack

A quantity of a recreational drug sufficient to fill the bowl of a small pipe used to smoke it.

To pack tightly by applying pressure. / (by extension) To fill to capacity.

Associated with ram-packing.