also: ディーティー
Internet slang abbreviation of 童貞 (どうてい). Used in casual online contexts, often with a self-deprecating or humorous tone.
See also: 童貞
People often write 'DT' online, but you don't really say it in real life.
It seems he finally lost his virginity.
彼はまだＤＴらしい。
Apparently he's still a virgin.