Cheers Season 8 Episode 1 Frasier uses it (leaving the bar and heading for the bathroom): "I've got to see a man about an equine."

dave's heads-over-heels for that sparkly blonde newscastress...yeah? shes' awfully equine faced!!

john didn't mind an equine faced 'babe' if there was a chance of him getting the 'poison' ground out of him.

he had a face like a blind cobblers thumb but something impressed her, maybe he had equine genes

I had to deliver multiple equine strikes to my girlfriend who wanted to text while fucking.

Stop that’s gonna damage your equinity

Have you ever seen Barrel racing?
Yes! I watch TK equine