facha
When you're right and someone else is wrong, you yell 'facha!' like it's the best thing ever. It's like winning the lottery.
"FACHAAAAA!!! I told you the pizza was gonna be bad!", Me, after my brother ate the whole pie.
My friend said 'facha!' so loud, the dog ran away.
I screamed 'facha!' and my mom gave me a cookie. It was worth it.