(informal) Packed or filled tightly.

simple past tense and past participle of jam-pack

(music) An informal gathering of musicians to play music, especially improvised jazz or a similar genre.

Third-person singular simple present indicative form of jam-pack

present participle of jam-pack

(printing) A malfunction in a computer's printer or a photocopier or similar device occurring when sheets of paper become jammed inside.

An open tartlet filled with jam / (rare, rhyming slang) Heart

(military) The deliberate radiation or reradiation of mechanical or electroacoustic signals with the objectives of obliterating or obscuring signals that an enemy is attempting to receive and of disrupting enemy weapons systems.

(skateboarding) A trick where the skateboarder skates over a bent pole.

(climbing) A climbing technique where the fist is forced into a crack and clenched.