the.com/ball and chain

The weight you volunteer to carry because the alternative is carrying nothing worth holding.

means A spouse or partner, especially spoken of as a restriction on one's freedom — or, literally, the shackled iron ball once used to hobble prisoners.

from The literal device is well documented: a heavy iron ball attached by chain to a prisoner's leg, used in prisons and labor gangs to prevent escape, common from the 1800s onward. The figurative leap — calling a spouse a 'ball and chain' — is a 19th-century slang joke, imagining marriage as its own kind of shackle. It's gallows humor wearing a wedding ring: the restraint is the same, only the sentence is supposedly one you asked for.

origin
19th century prison restraint, literal iron ball
linguistic shift
slang for spouse by early 1900s
irony
usually said fondly, rarely said sincerely
who says it
almost always the one not wearing it
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