Wet = bloody clothes = dead. He’s saying Drake never hurt anyone, and his tough-guy braggadocio is laughable.
Drake hails from Toronto, Ontario, Canada. Not exactly Watts — or the South Side of Chicago.
Canada Dry is a brand of sodas and ginger ale. (Ginger ale is light and sweet and it’s also “pop” = soda or “pop” as in Drake’s true genre.)

