An extended, luxurious and celebratory male masturbation session with extended orgasm and delayed or no ejaculation. A moosh often includes some or all of the following: erotic movies, massage oil, incense, kord device, butt plug or anal dildo, special music, marijuana.
Jack: Are you coming to the pub with me and Martin?
Max: No, I'm off home for a moosh. Catch you guys later.