A parable passed down for generations describing the futility of the unintelligent to perform simple tasks.
Since ancient times, when an imbecile, ill-advised coworker or friend has attempted an assignment beyond their capabilities, they are often compared to a monkey endlessly trying to fix an engine that won't start by beating on it with a hammer, because monkeys do not possess the skills of a mechanic.
After being shown how twice, Dan never did learn how to open the fence, so it rained on him a few hours later. He was just like a Monkey Beating An Engine With A Hammer that day.
A term originating from (and almost exclusively used on) Roblox used to describe low effort RPG games with repetitive gameplay, uninteresting combat, and little absolute 0 replay value. If the game is a Bandit Beater there is also a solid chance it's also a Cash grab.
"Person 1: So how is that new game that dropped like?"
"Person 2: 30 minutes in and the only thing I've been doing is punching stupid NPC's that don't even block."