A man who has sex with other men in public toilets for money. Marwood is mistakenly identified as one in the film "Withnail and I."
Monty: About how you came to Chelsea and your arrest in the Totenham Court Road. He told me about your problems, how you feel.
Peter: Problems, what problems?
Monty: You are a toilet trader! Go with it boy, give into to it. It’s like a tide. Don’t let it ruin your youth as I nearly did over Eric.
Peter: I’m not homosexual, Monty.