My uncle got this hand carved out of wood during his travels as a merchant marine. When he bought it from a local vendor in a far off locale they assured him that the gesture being displayed was how people wished each other good luck in their particular culture.
To this day I don't know if that's true. Was some dude having fun at my uncle's expense? Maybe. Does this particular little wood carving actually mean "good luck?" Possibly. Above, is Pickle the Kitten wishing me luck? I highly doubt it!