Used to Be Bad by Paul McCartney, featuring Steve Miller, is a lively rock and blues track reflecting on past escapades and a rebellious spirit. The song, from McCartney's 1997 album 'Flaming Pie,' reminisces about a time when the narrators were known for their wild and unruly behavior, hinting at their youthful indiscretions with a mix of humor and nostalgia. The lyrics convey a sense of carefree fun and a touch of braggadocio, as McCartney and Miller exchange verses about their 'bad' pasts. The key themes include reflection on past behaviors, the passage of time, and the contrast between youthful rebellion and present-day reality. Notably poignant are the playful exchanges in the lyrics, highlighting a camaraderie and mutual recognition of their former selves. The song's upbeat bluesy rhythm underscores the tongue-in-cheek attitude towards looking back at one's wilder days.