Eateth on
A way to cheer someone on like they're about to do something stupid and amazing at the same time.
"Eateth on, you meaty moron! I bet you're gonna fall off that ladder!"
"Eateth on, you s***-faced genius! I bet you're gonna win this fight!"
"Eateth on, you greasy goblin! I bet you're gonna eat that whole pizza!"