A beno is also known as a bong. The term "beno" is derived from bean. Bean was derived from beano. Beano was derived from b-no. B-no was derived from the word itself, "bong."
Bean can also be used as a verb.
"Pass the beno."
Man 1: "Bro, did you bring the good beno?"
Man 2: "Hell yeah bro, it's bean time!"
Man 1: "Hell yeah bro, let's get beaned!"
Beno. An offensive term used to call someone, normally another school mate or peer, homosexual in the South Wales area (last used about 15 years when were in High School)