A kind of diarrhea-type bowel movement where the force of the fecal evacuation causes your legs to jerk around. A fine example of this phenomenon can be seen in the film Dumb and Dumber, after Larry (Jeff Daniels) accidentally consumes a gross amount of laxative.
I drank Steel Reserve all night and the next morning I had crazylegs all over the place!
See diarrhea, anal hiroshima, blowout, skitters, the trots
