haiyah - The noise ninjas make when they’re creeping up behind you an

The noise ninjas make when they’re creeping up behind you and you’re totally gonna get caught.

I heard 'haiyah!' and turned around, and there was a ninja holding a sword.

My brother said 'haiyah!' and then he jumped out of the closet and scared me.

I was walking home when I heard 'haiyah!', and then I got chased by ninjas.