To roughly force into a small space or difficult position. / To travel about with no fixed destination.

A forceful poke or shove. / A person who forces his or her way around.

plural of jam roll

(UK) A kind of pudding, a roly-poly with jam filling. / (UK, rhyming slang) Parole.

The situation where material becomes jammed in a machine.

plural of jam-up

(baking) A small shortbread biscuit with a small amount of red jam in the centre.

plural of jam tart

plural of jam sandwich

(idiomatic) Promised benefits that never arrive. / (idiomatic, economics, by extension) Availability of a resource at a future date.