also: シロウトどうてい
noun
man who has only had sex with sex workers
Slang term for a man whose only sexual experience is with sex workers; often used in discussions about male virginity and sexual experience.
彼は素人童貞で、普通の恋愛経験がない。
He's a man who has only had sex with sex workers and has no ordinary romantic experience.
Compound of 素人 (amateur, non-professional) and 童貞 (male virgin). The term likely arose in internet slang to describe a man who is technically not a virgin but has no experience with non-professional partners.