The story
Originated from a viral 2020 tweet by a BTS fan apologetically addressing group member Suga (known by the fan nickname "Lil Meow Meow") as "my poor meow meow...my baby my little baby who hurt^([sic]) so much […] ." The tweet was made in response to the controversy over Suga's sampling of a speech by cult leader Jim Jones (1931–1978) on his solo mixtape D-2.
Etymology from Wiktionary, CC BY-SA 4.0.