(idiomatic) Something very funny or amusing.

Used other than figuratively or idiomatically: see double, barrelled. Having two barrels, as a gun. / Twofold, having a double purpose or nature.

plural of barrel child

A child in a developing country whose parents have found employment abroad. The stereotype is one of relative financial well-being, but emotional detachment from the parents.

plural of barrel roll

(aviation) An aerobatic flying maneuver in which the pilot causes the airplane to complete one loop in the same time that the airplane completes one roll, creating the appearance that the airplane is riding on the inside of a cylinder.

An internally threaded screw having a slotted head.

plural of barrel nut

(architecture) A roof having a semicircular cross section; used to span large distances in railway stations etc

A musical instrument in which air from a bellows is admitted to a set of pipes by means of pins inserted into a revolving barrel (typically turned by a crank), originating in France.