n. a sudden puncturing of a pneumatic tyre / tiren. a sudden release of oil and gas from a welln. a social function, especially one with large quantities of foodn. 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.n. A sandy depression in a sand dune ecosystem caused by the removal of sediments by wind.n. an extreme and unexpected increase in costs, such as in government estimates for a project.n. The cleaning of the flues of a boiler from scale, etc., by a blast of steam.