noun, noun or participle which takes 'suru', intransitive verb
Colloquial expression for a male's first sexual experience, often used in casual or slangy contexts. The verb form is 童貞卒業する.
彼は二十歳で童貞卒業したらしい。
Apparently he lost his virginity at twenty.
I got teased by my friends about losing my virginity.