noun
tick; mite
General term for ticks and mites; commonly used in everyday contexts such as pest warnings and pet care.
山でダニに噛まれた。
I was bitten by a tick in the mountains.
ペットにダニがついていないかチェックしてください。
Please check your pet for ticks.
noun
Colloquial, somewhat dated slang for a ruffian or street tough; not commonly used in modern conversation.
あの界隈はダニみたいな連中がたむろしている。
That area is full of hoodlum types hanging around.
Rare kanji form for tick/mite.
Rare kanji form for tick/mite.
The origin is uncertain. The tick/mite sense is native Japanese, while the slang sense likely derives from the idea of a blood-sucking pest.