:cascade: n. 1. A huge volume of spurious error-message output
produced by a compiler with poor error recovery. Too frequently,
one trivial syntax error (such as a missing `)' or `}') throws the
parser out of synch so that much of the remaining program text is
interpreted as garbaged or ill-formed. 2. A chain of USENET
followups, each adding some trivial variation or riposte to the text
of the previous one, all of which is reproduced in the new message;
an {include war} in which the object is to create a sort of
communal graffito.
-- The AI Hackers Dictionary