i. A horse or pony that has long standy-up hair that looks like it has been electrified and wide-eyed mildly startled expression.

Or

ii. A way of shouting ponieh as you drive past a horses field and are excited to see them (high pitched ending as in ponnn -ieh!!)
Oh my look at that ponieh!!

There's a ponieh!!
by parksya April 27, 2012
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