A greyhound, especially as a racing dog:he’d put the money on a dishlicker...
It's a sort of eBay for horse racing—and of course the trots and the dishlickers—which matches up punters and odds on the Internet like buyers and sellers.
There is a consensus that the dishlickers are a vaguely corrupt scion of the racing world, but nothing could be further from the truth.
I suggest they leave it to the trots or the dishlickers and go for a toned-down alternative.