A phrase used by senile people confused thinking of the more common phrase "one trick pony".
*Replying to press after reporter asks if allegations against Hunter Biden are Russian disinformation:

"Yes, yes, yes. God love you, man. You're a one horse pony."
by senior jota December 23, 2020
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You meant to say ONE HORSE SHOW, ONE TRICK PONY or ONE HORSE SALLY but your memory is failing you so you just make words up, like ONE HORSE PONY
Yes, Yes, Yes. God loves ya man, you're a one horse pony
by Natosuperman December 23, 2020
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One Horse Pony is the senile way of saying you’ve lost your marbles; or a perverted act
by Millennial_things December 24, 2020
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A sexual position where a larger woman uses a strap-on (Horse) to peg a smaller man (the pony)
Awh man that stripper Jaquanda brought out the One Horse Pony last night, I can’t walk”
by Joeyb December 23, 2020
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1) Refers to XXX-rated live stage female performers ("ponies") that will use only one stallion as a sex partner for all performances.

2) When said, it is a jab at Joe Biden not knowing the correct saying of "one TRICK pony" when he snapped at a reporter that was tenaciously asking questions about his son Hunter's alleged wrong doings with regard to international financial transactions.
"I don't know what she's going to do when they put that stallion out to stud!" LOL

"C'mon man! You're a one horse pony on that question, I'll give you that!"
by Rico949 December 24, 2020
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A misstated version of "one trick pony," used when you gamble with a brain fart and lipshit yourself.
Yes, yes, yes. God love you, man. You're a one horse pony," Biden replied as he made his way offstage.
by Daniel Favor December 24, 2020
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The flim flam that pony soldiers say in the hoosegow.
C'mon man! That flim flam is from the hoosegow and a one horse pony!
by Sully McCockleshank December 23, 2020
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