Duracell Bunny
1. A pink leporid used to advertise Duracell batteries in Europe and Australia; he predates the similar Energizer Bunny popular in the United States and was first used in the 1970s under the slogan "It lasts and lasts and lasts".
2. A man who can last a long time during sex before having an orgasm without getting tired. This term is seen as approbatory due to said man's ability to give his female (or male) partner several orgasms over a long period of time before losing endurance. It is usually used in the form of a simile rather than a noun.
"John was like the Duracell Bunny last night, I came five times before he even broke a sweat!"