master/slave Posted in M Best definition master/slave A type of role play involving a master and a slave; this could be sexual or not. Do you want to master/slave rp with me? I can be the slave but you’ll have to be aggressive. 😉 How satisfied are you with the definition? Looking for master/slave meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 88 times.