Cowabunga it is

An expression used to accept a challenge, wage war or defend one's honor by unspecified but extreme/chaotic measures.
In all instances it is a simple way of indicating that come what may, your decision is set in stone.

Her: If you don't pause your game right now, we're breaking up.
Me: Cowabunga it is.

by The Doctopus November 28, 2019