Martxe Posted in M Best definition Martxe slang form meaning slut, tramp, and/or prostitute. One who has sex with an entire group of people or animals in order to gain attention for various reasons. That lady was a martxe when she went to that party. How satisfied are you with the definition? Looking for Martxe meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 97 times.