A personal highlight for me from camp was when an 11 year old kid went up to another one, pointed at him, and said - “yo, moo off?”
There was a nod of the head from the opposing child, and without any further prompting they both started to moo loudly until the losing child had no more breath left to maintain the moo.
They shook hands, the winner graceful in victory, and they continued on their ways.