IDSB meaning in Community ?

"I Did Something Bad" is a song by American singer-songwriter Taylor Swift, taken from her sixth studio album, Reputation (2017). The song was written by Swift and its producers, Max Martin and Shellback. It features a heavy electronic production that combines electro-trap, grunge and EDM elements, incorporating manipulated vocals and electronic instruments. The lyrics are about Swift's lack of remorse after acknowledging her allegedly wrongful behaviors that caused a sensation, inspired by the female characters Sansa and Arya Stark of the fantasy series Game of Thrones.

The song received mixed reviews from critics, who were either impressed by the production and Swift's self-assertion or critical of the themes of drama and vengeance. "I Did Something Bad" charted at number 14 on the Bubbling Under Hot 100, an extension to the US Billboard Hot 100, and at number five on the New Zealand Heatseeker Singles, an extension to the New Zealand Singles Chart. Swift included the song on the set list of her Reputation Stadium Tour (2018) and performed it on the 2018 American Music Awards.