"a barrel of (laughs|fun)" 的定义和意义

What is the origin of the idiom "a barrel of laughs" and when to use it?

The idiom "a barrel of laughs" originated in the early 20th century and draws upon the image of a barrel, typically associated with containing a large quantity of something. It signifies an abundance or an ample supply of laughter or amusement. The phrase is used figuratively to describe a person, event, or situation that is highly entertaining, enjoyable, or humorous, often suggesting a lively and light-hearted atmosphere.