The sport of hockey, played with using a Gerbil as a hockey puck.
Also has similar meaning to the word Horseplay.
Me and Bill played Gerbil Hockey last night, it was so much fun until Tom hit the Gerbil too hard and it splattered all over my new pants.
Cut out the Gerbil Hockey, kids, there's no room for screwing around in Wood shop.
With all the loud music and gerbil hockey next door, I can't get to sleep!