na-adjective, noun
Slang term formed by inverting the syllables of 派手 (はで). Used to describe something or someone that is conspicuously flashy, gaudy, or over-the-top in appearance or style.
See also: 派手 (はで)
あのデーハーなスーツ、すごいね。
That flashy suit is something else, isn't it?
彼女のファッションはいつもデーハーだ。
Her fashion is always loud and showy.