dumb ox
Someone who is large in size and is apt to behave stupidly. Usually used of a man. Can you believe that dumb ox is still pushing the door marked "pull"? Yeah, he's a linebacker for the football team, but he's no dumb ox—he's at the top of his class academically. In the end, I didn't need to throw a single punch—the dumb ox tripped, fell, and knocked himself out all on his own.
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