blowout

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A sudden rupture or bursting, as of an automobile tire.
• noun The hole made by such a rupture.
• noun A sudden escape of a confined gas or liquid, as from a well.
• noun A large party or other social affair.
• noun A lopsided victory or thorough defeat.
• noun A sale in which the discounts are unusually large.

from the GNU version of the Collaborative International Dictionary of English.

• noun colloq. a gay or lavish festivity.
• noun the sudden deflation of an inflatable tire due to a puncture or rupture, often accompanied by a bang.
• noun the sudden escape of gas or liquid confined under pressure, such as in a gas or oil well, or in a system containing pressurized air or steam.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a sudden puncturing of a pneumatic tyre / tire
• noun a sudden release of oil and gas from a well
• noun a social function, especially one with large quantities of food
• noun slang, sports A sporting contest that is decidedly one-sided and whose outcome is no longer in doubt. Often occurs when one team is superior to the other.
• noun geology A sandy depression in a sand dune ecosystem caused by the removal of sediments by wind.
• noun Australia an extreme and unexpected increase in costs, such as in government estimates for a project.
• noun The cleaning of the flues of a boiler from scale, etc., by a blast of steam.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an easy victory
• noun a sudden malfunction of a part or apparatus
• noun a gay festivity