Here be a thread where you can invent your own attacks for the One Piece characters. Sorry if there's already a thread like this but I did search and if there is a thread like this, I'll be happy to delete this one. Anyway…
????????-Gomu Gomu No Fuusokukei (Anemometer)
Luffy starts off by grabbing something in the distance but also twists his arms, like a cross between Rocket and Tsuchi. When he unwinds the arms, he is sent flying while spinning. He then stretches his leg out like in Muchi, bbut it is now in a cup shape. So he's flying through the air spinning with his leg stretched out like a cup.