The Pony Jar was a meme back in ye old days of tumblr that originated from a man who made posts about his “pony jar” which was a glass jar with a singular my little pony toy in the middle. And he would put his semen in the jar to cover the toy

Now it is used as a way to ruin people with internet culture’s day
“Bro I can ruin your day in 2 words”

Bet,”
“Pony Jar”
by Velvet.Exe January 2, 2020
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A very sexual project where people release their jizz in a jar where Rainbow Dash is placed.
Pony In A Jar is so disgusting!
by SexualAnonymous September 20, 2022
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