>>22517259It's a still from A Minecraft Movie that recently released. In this scene, a Baby Zombie rides a chicken in a trial by combat (colloquially known as a Chicken Jockey)
Jack Black, being an astute observer, notices the aforementioned Chicken Jockey and appropriately says, "Chicken Jockey!"
TLDR; it's the new-age version of quoting South Park to your friends
