spot back 

a phrase called out to reserve one's location of sitting while they temporarily get up to do something

Did Keith call spot back? I'm gonna steal that asshole's seat

spot back by primality February 24, 2010

"quack quack spot back" 

A method of claiming one's seat when one must leave it for a short amount of time. See also dibs, fives. Obscure Northern Wisconsonian dialect.

I claimed "quack quack spot back", but my buddy stole my seat anyway.

"quack quack spot back" by Ro-hizzle December 13, 2006