The adjective "el jolly" means "gleeful, harmless chaos that are committed in a playful & funny manner.".
When you shove a cookie into a child's mouth to shut him up, you're el jolly (or crazy, if you do this regardless of what the kid is talking.). In that meaning, then when your cat kicks a ball onto your face, then growls and jumps off the table, then it's el jolly.
"You killed three bandits in Red Dead Redemption 2 just by jumping on a bed and fallin' on them? That's el jolly. Now go make a celebration coffee."