Crabs 'a' Way Share definition Flag n. - a type of "medicine", otherwise known as a Razor, used to shave your pubic hairs to get rid of your krabs for a short period of time Dude, Johnny used the Crabs 'a' Way method just to go on a date tonight. Crabs 'a' Way by Tattoo May 23, 2007 Get the Crabs 'a' Way mug.