A choclate bandit mask is When a burgler breaks into your house and you overcome him and then fuck him and shit on his eyes and smash it in the form of a mask.
Police Officer: What happend here?
House owner: He broke into my house
Police officer: Then what?
House owner: I overcame him and gave him a chocolate bandit mask
Police officer: Thats hot as fuck House owner: Do you want a chocolate bandit mask
When you dip your balls in chocolate and place them over someone's eyes, so that when you move your balls away it looks like they are wearing a bandit mask made of chocolate.