el diablo means: Pewdiepie’s favorite gun. (in Open Dictionary, added by Margarita Santiago)

What else does el diablo mean?

All of it is evil and unholy. El Diablo mercilessly tears the spine of her mate and renders him a tiny bitch who caters to all her needs. By shunning his hobbies and friends, she tries to take sole possession of his soul. (in Open Dictionary, added by Brynlee Barry)

A person who acts devilish. (in Open Dictionary, added by Priscila Montero)

Spanish is the devil. (in Open Dictionary, added by Madelynn Mason)