Dink
来自Big Physics
1980s: acronym from double income, no kids .
wiktionary
Imitative. Originally US. Attested since the 1930s.
Origin unknown. Attested since the 1930s.
Origin unknown. Attested since the 1960s. Compare Chink, a derogatory term for a Chinese person.
Initialism. Originally US. Attested since the 1980s.
See dinkum.
Origin unknown. Attested since the late nineteenth century.
Origin unknown. Attested in English and in Scots since the sixteenth century.
See dinq.
etymonline
DINK
acronym for double income, no kids, popular from 1987.
dink (n.1)
"drop-shot," in lawn tennis, 1939, probably somehow imitative. As a verb by 1942. Related: Dinked; dinking.
dink (n.2)
derogatory for "Vietnamese," 1969, U.S. military slang, of uncertain origin.