Absolute bullshit. The speaker will say this in an effort to sound like they aren't cursing. This is also an indicator of someone most likely over the age of 50.
A cat whos ass smells like horse shit.
Cats putting their litterbox muscles in your face is not as uncommon as one might think, so you can get a snootful fairly readily. :-/
Piss you!!! My f'in cat is a true horse puckey cat if ever there was one!!!
(Guy #1): So the Mariners and the Braves are going at it in this year's World Series?
(Guy #2): Yeah, I hear that it's gonna be a pitcher's duel or or some such horse puckey.
This marvel is a merely an unfortunate person who has gums like a horse because his/her teeth are visible only subtly, while the gums look ample and luxurious. Although pucker horses are uncommon, you can spot them as soon as they smile.