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 sniffers onto the bus. There's no way I'm smuggling dope through the airport—that place is crawling with pot sniffers!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See pot hound
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.