Top Definition
A term usually applied to an adolescent male human. Well endowed but not as well as a horse. Can apply to physical or mental attributes.
Female: "That junior high party was awesome last nite!!..That Shetland Pony (cock) rocked my world!"

I can't stand to admit it but that Shetland Pony Cock can definitely piss for miles.
by JLSK February 03, 2012
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