Similar to a wasteman, a washman is ‘has been’ wasteman. Usually incapable of making or organising plans and regularly fails be accepted in normal society.
Person 1: Hey there’s Jamal, should we invite him to our gathering?
Person 2: No he’s a washman.
A sexual act involving a vacuum cleaner. Quite often self inflicted.
Person 1: Hey did you see the latest Avengers movie?
Person 2: No sorry I was at home with having a probsuction with my new dyson.