Do you know what SAWCON is?
SAWCON deez nuts.
Alright listen up, buttercup. This joke is playing on the word "SAWCON" to sound like "suck on." Then, the punchline is "SAWCON deez nuts," which sounds like "suck on deez nuts." If I have to explain that "deez nuts" is slang for testicles, well you are a lost cause. Also I know where you live, so be careful.