Casual slang for サングラス, formed by reversing the syllable order (サン+グラス → グラ+サン). Common in spoken Japanese and informal writing but avoided in formal contexts.
Common collocations
- グラサンをかける: to put on shades
- グラサンを外す: to take off shades
- グラサン姿: appearance wearing shades
Register
Informal only. In writing, business, or polite conversation, use サングラス instead.
Similar words
- サングラス: sunglasses — the standard, neutral term
- 眼鏡: glasses — general eyewear, not sunglasses