A couples vibrator is a vibrator designed for use by a couple sometimes as part of intercourse. A couple can technically use any vibrator, but some are easier to maneuver during partner play than others. Some, like vibrating cock rings and the couples' vibrators made by LELO and We-Vibe, are designed to be used during intercourse to provide clitoral stimulation.
A couples' vibrator may also be known as a couples' massager.