gum and tonic Share definition Flag Gin, Rum, and tonic. Pronounced "jum and tonic" It's gum and tonic. Gin, rum, and tonic.--You can't get drunk on gum and tonic; it's a breakfast liqueur gum and tonic by laurnTHEgreat January 15, 2011 0 0 Get merch Get the gum and tonic mug. Buy Now — $32.95 See more merch