Canaille Share definition Flag Cajun adjective (kah-NIGH) used to describe a person who is usually hiding something, such as true intentions or ulterior motives. You can see in that canaille little smile, he's up to something. Canaille by Booshstash September 21, 2011 0 0 Get merch Get the Canaille mug. Buy Now — $32.95 See more merch