One who enjoys the art of plugging away at something until they have succeeded against all the odds.
Steve is at the pub and spots a hot chick on the dance floor. He approaches her and askes her to come home with him and is denied. Feeling really down he goes off and gets her a triple burbon and coke and gets his mate to give it to her. She drinks it, and then he approaches her again. This time she throws her arms and legs around him and says yes, take me know handsome prince. Nice work chipper