Empty talk that is intended to impress
they dismissed the theory as a load of hot air
An external-combustion engine using the expansion and contraction of repeatedly heated and cooled air to drive a piston in a chamber.
The use of a hot-air balloon; travel in a hot-air balloon.
A person who flies or travels in a hot-air balloon.
A tool used to strip paint by means of a stream of very hot air
A large bag filled with hot air or gas to make it rise in the air, typically one carrying a basket for passengers