I need the help of my UK readers (either one of you). My sister, like me, watches The Office on the loathsome BBC America, and she wants to know what the word benny means in the sentence, "Gareth is a benny." I couldn't find it in my usual place to look up oddball British slang. If none of you know, you can just make up something since my sister's almost completely convinced that when it comes to slang, British people make a lot of it up as they go along.