n (juggling) A pattern typically performed with an odd number of props, where each prop is caught by the opposite hand.
n (Internet) A sequence of absurd short messages posted to a newsgroup by different authors, each one responding to the most recent message and quote|quoting the entire sequence to that point (with ever-increasing indentation).
v (intransitive) To fall as a waterfall or series of small waterfalls.
v (transitive) To arrange in a stepped series like a waterfall.