baby butterfingers

A term used in the popular child's game "Hide and Go Seek". When a child reaches "home" or the base they must stay there until evryone is back at base or someone is tagged (ending the round). However once reaching home if the player yells baby butterfingers they are free to leave the base and carry with it it's immunity. Meaning they can't be tagged.

Billy reaches the base and yells "BABY BUTTERFINGERS!!!"
Then Zach can no longer tag Billy