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Use "horsie" in a sentence
"I suspect that the first time you refer to the knight as a "horsie," you're going to find yourself on a lifeboat with no flare gun."
"Thank you to everyone who's helped out, but I gotta say whoa, horsie, stop, oh, please stop horsie, oh, c'mon, whoa, please whoa! to the flood for now."
"A stallion sounds even better than a horsie or a pony."