jammers /ˈd͡ʒamə(ɹ)z/adjective 1noun 1 adjective1 •(slang) Of a place or room: full."Jesus, it's jammers," said Aesop, looking around the pub when they pushed open the door. — 2007 noun[plural only]1 •A kind of form-fitting swimwear used by athletes, resembling shorts.As for me, I wear a dragsuit to the pool, and regular trunks to the beach. In competitions, I wear speedos, but am more comfortable in "jammers", which is a half-bodysuit. — 2001