The term “olly illy oxen free”…
Olly olly oxen free is a catchphrase used in such children's games as hide and seek to indicate that players who are hiding can come out into the open without losing the game.

This is a flat out party song with a very important message to every kid. Be whoever you are, cast off your fears, and don’t be ashamed of what you are inside…in other words, come out! Just like in the game. Celebrate that person and join the party.
So without overtly saying it, this is very much a song for kids who might find themselves in the closet…but that closet could represent anything, even just being shy. It’s universal.
The song’s set to a party Bo Diddley beat. Throw in a little Buddy Holly, a little bit of the Who, a quote from Joe Strummer of the Clash, and a little Rapper’s Delight breakdown and you got a dance party!

Olly Ollie Oxen Free

Hootenanny Pete