noun
dirty talk; lewd conversation; smut
Refers to sexually explicit or indecent conversation, jokes, or stories. Often used in casual or disapproving contexts.
飲み会で猥談ばかりする上司には困ったものだ。
That boss who only talks dirty at drinking parties is a real problem.
彼の猥談にはついていけない。
I can't keep up with his lewd stories.
Compound of 猥 (wai, 'obscene') and 談 (dan, 'talk, conversation'). The kanji 猥 is not in the jōyō set, but the word is common enough to be recognized.