1. Loud noise; din. See synonyms at noise.
2. Confusion; tumult.

[Probably of Irish Gaelic origin, akin to Scottish Gaelic ubub, an interjection of aversion or contempt.]

WORD HISTORY   It has often been remarked that the early Celtic inhabitants of Britain contributed very little to the stock of English words. Perhaps this should not surprise us, given the difficult relations over the centuries between the people of Germanic stock and the people of Celtic stock in England and Ireland. It seems likely that a certain English contempt resides in the adoption of the word hubbub from a Celtic source, which is probably related to ub ub ubub, a Scots Gaelic interjection expressing contempt, or to abu, an ancient Irish war cry. In any case, hubbub was first recorded (1555) in the phrase Irish hubbub and meant "the confused shouting of a crowd." In addition to the senses it has developed, hubbub was again used, possibly in an unflattering way, by the New England colonists as a term for a rambunctious game played by Native Americans.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.