srup Share definition Flag Canadian ghetto slang for "what's up." Derives from a portmanteau of "sup" and "syrup," as Canada is well known for being a major manufacturer of maple syrup. Srup, ma homies? Srup in yo pancake, holmes. srup by plk_ November 25, 2009 0 0 Get merch Get the srup mug. Buy Now — $32.95 See more merch