also: せーへん · しいひん · しーひん · しやん
expression
Kansai dialect negative form of する, equivalent to standard しない. Used in casual speech.
そんなこと、せえへんよ。
I won't do such a thing.
彼はまだ宿題をしいひん。
He hasn't done his homework yet.
Kansai dialect contraction of せぬ (classical negative of する) or related forms, with the Kansai negative suffix へん.