na-adjective
Internet slang derived from おしゃれ, often used sarcastically to mock someone's overdone or try-hard fashion sense.
See also: おしゃれ
あの服、オサレすぎて笑える。
That outfit is so try-hard fashionable it's funny.
オサレなカフェで写真を撮るのが好きだ。
I like taking photos at chic cafes.