1. Any dog trained by law enforcement to detect drugs, especially marijuana, by smell. I broke out in a cold sweat when I saw them bring the pot hounds onto the bus. There's no way I'm smuggling dope through the airport—that place is crawling with pot hounds!
2. Any stray, mixed-breed dog; a mutt. A slang term specific to the islands of the West Indies, especially Grenada. Our family befriended a pot hound that kept sniffing around our garbage, eventually adopting the rascally thing as our own. This part of the island is positively crawling with pot hounds.
pot houndand pot sniffer
n. a dog trained to sniff out cannabis. (Drugs.) The pot hound at the airport is always busy finding marijuana. A cute beagle named sparky greeted me as today’s “pot sniffer” in the baggage claim area.