also: もさい
i-adjective
unfashionable; uncool; unrefined
Slang adjective describing someone or something as drab, unstylish, or lacking polish. Often used in casual, sometimes teasing, contexts.
あの服、もっさいね。
Those clothes are so unfashionable, aren't they?
彼の髪型、ちょっともっさいと思わない？
Don't you think his hairstyle is a bit uncool?