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English word gasbag comes from English gas, English bag
gas (English)
(US) To fill (a vehicle's fuel tank) with fuel.. (US) To give a vehicle more fuel in order to accelerate it. (Ireland, colloquial) comical, zany; fun, amusing (US) Methane or other waste gases trapped in one's belly as a result of the digestive process.. (baseball) A fastball.. (countable) A hob on a gas cooker.. (countable, chemistry) A chemical element or compound in such a state.. (slang) [...]
bag (English)
(UK) A unit of measure of cement equal to 94 pounds.. (baseball) First, second, or third base.. (baseball) The cloth-covered pillow used for first, second, and third base.. (derogatory) An ugly woman.. (informal) A handbag. (mathematics) A collection of objects, disregarding order, but (unlike a set) in which elements may be repeated.. (preceded by "the") A breathalyzer, so named because it [...]
gasbag (English)
(intransitive) To speak foolishly, pompously, or at length; to blather. (figuratively) A person who is overly garrulous or prone to making empty, unsupportable statements; a windbag.. A bag or bladder to hold a reservoir of gas, as in a hot-air balloon.