A kind of form-fitting swimwear used by athletes, resembling shorts.
2001, Newsgroups: rec.sport.swimming, Mon, 09 Jul 2001 21:39:52 GMT, Subject: Re: Laying out in Myrtle Beach
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.