Forum:What is the song Luffy sings?

The song is in episode 169. Luffy is walking along singing when one of the enforcers makes a sound like a goat and distracts him. the enforcer attacks him and Luffy pawns him with one swing. He continues on walking through the forest and begins another verse. After finishing this verse he is distracted by Wiper. After a conversation with Wiper, Luffy begins singing a third verse he is interupted by Wiper who says he wants a fight. My question is what the heck is this song? It's hilarious.