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1.
A massive donation online WITHIN A SMALL TIMEFRAME to a non-profit organization or political campaign by an organized giving effort.

Wordage first seen in reference to the November 5th, 2007 Money Bomb to Ron Paul, presidential candidate. The effort gave Dr. Paul $4.3 million in 24 hours all from individuals averaging a $103 payment. This act made him break the record for the most money ever given to a REPUBLICAN PRESIDENTIAL CANDIDATE in a single day.
"Ron Paul supporters are at it again. They are planning another Money Bomb on Dec. 16th--the Boston Tea Party."

"In an effort to support the Red Cross, our university organized a Money Bomb along with the locals. We raised $100,000 in two hours."
by quickstepper November 08, 2007