A female backside that resembles a young pony. Characteristics include but are not limited too: a rounded butt, firm muscular legs, a confident walk that could be categorized as a strut, and tight athletic wear. This term specifically refers to the shape and physical fitness of the female backside in question and does not only include the butt. It encompasses the entire region from the belly button to the ankles. The term also implies that one would like to 'ride' the Pony Ass.
Attractive young female power walking.
Me: Damn, look at that!
Friend: That is one hell of a Pony Ass!
by Pony Ass May 6, 2014
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A name you call someone who YOU think looks like a horse..or if you have a friend who's hung like a horse, you can call him that too..
You: 'Look at that girl, she looks like a horse!'
Me: 'Ew, I know! Stupid pony ass bitch!'
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You: 'I'm hung like a horse.'
Me: Shut the fuck up you pony ass bitch!'
by DKhoner December 20, 2005
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When bronies parents find out they fuck ponies
Brony: MOM IM SORRY ITS A VIRUS FOR PONIES

Mom: PONIES MY ASS. IM GETTIN THE BELT

Brony: NOOOOOOO PLEAAAAASEEEEEEEEEEEEEEE
by bigbootybitches655 September 14, 2020
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A derogatory term used to describe ones actions. Specifically, used to describe someone who has done something stupid, is being annoying, or someone you just don't like. This term is often used as a close second to calling someone a dildo or retard.
"Hey Brian stop being such an ass pony"
or, "Brian you are really being an ass pony right now" or, Brian get the fuck away from me I don't associate myself with ass pony's"

by benmu November 20, 2006
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A driver who tailgates other drivers.

Driver with little patience, subscribing to the belief that being 1 foot behind the person in front of them will make traffic move faster on the freeway.

commuter of the 91 freeway in southern californa who typically commute two hours each way to work to take advantage of cheap housing and to live near white trash relatives.

NASCAR fans who practice drafting on fellow commuters often in an SUV or a raised white trash looking truck
That chick is an Ass Pony.

That ass pony is going to kill somebody.
by damnriver January 24, 2007
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