From the NES game "Snake Rattle 'n Roll." Little balls that are eaten to make your tail longer. Depending on the level in which they are found, nibbley-pibbleys have various means of locomotion, such as fish tails or helicopter blades. Nibbley-pibbleys can be orange, purple, or yellow; eating one the same color is better than eating one the color of the other snake, but the yellow ones are the best of all.
by anonymous Jun 16, 2003 add a video