DINK is an acronym that stands for "Dual Income, No Kids". It describes a couple who do have double income and do not have children.
The term was coined in the 1980s at the height of "yuppie" culture. The Great Recession has solidified this social trend as more couples wait longer to have kids. In the Netherlands, one in five couples choose not to have them at all.
Variations
DINK also exists and is used for "Dual Income, No Kids" in the United States, South Korea, and Japan. DINK is used in reference to childless couples.
DINKER means "Dual (or Double) Income & No Kids Early Retirement". Some marketers have proposed "yappie" as a term to describe similar couples who do have children.
DINKY means "Double Income, No Kids Yet" and there is a sitcom in The United Kingdom with that name.
A close antonym, mainly intended as a joke, is SITCOM, which stands for "Single Income, Two Children, Oppressive Mortgage.