One of the mysteries of the English language finally explained.
1A song sung by, or associated with, a particular political group or faction.
2A song sung at a party; a piece of music played at a party, usually for people to dance to.
Early 18th century; earliest use found in James Bramston (?1694–1743), poet and Church of England clergyman. From party + song.
party song/ˌpɑːti ˈsɒŋ/
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