ball and chain

a heavy iron ball fastened by a chain to a prisoner's leg.
a burdensome restraint:
"The steady accumulation of small debts was a ball and chain to his progress."
Facetious Slang: Often Offensive. a person's spouse or romantic partner, especially a female.
1825–35, Americanism
Usage note
In the meaning “romantic partner,” this term is consciously used for humorous or playful effect. But it is often perceived as insulting, implying that the partner is a burden or restriction on the other partner.
British Dictionary definitions for ball chain
ball and chain
1.  (formerly) a heavy iron ball attached to a chain and fastened to a prisoner
2.  a heavy restraint
3.  slang a wife

Collins English Dictionary - Complete & Unabridged 10th Edition
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