When you fart and the sound that accompianies it sounds likeChewbacca's scream.
A guy is standing in the bathroom, tries to shit but only a Chewbacca butt comes out. Accordingly, the theme song to Empire Strikes Back starts to play through the intercom.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.