Rhizostoma pulmo, a species of venomous jellyfish that looks similar to a mushroom.

An internally threaded screw having a slotted head.

plural of barrel roll

(dated) intoxication or illness from intemperance in drink

(firearms) A gun barrel formed by twisting and welding strips of metal around a hard die; no longer commonly used now due to its inability to handle high cartridge pressure on modern ammunition.

(idiomatic) Something very funny or amusing.

(idiomatic, often sarcastic) A great amount of enjoyment or entertainment, or something or someone that provides this.

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 child

plural of barrel nut