Having asserted her worth in the verses, Cardi states in the chorus that her popularity and success is enduring (i.e. she's going to remain "up").If it's up, then it's up, then it's up, then it's stuck
The phrase, "it's up then it's stuck" describes success that can't be stopped. During a YouTube Live interview, Cardi explained the term is Southern slang used on the streets of her husband Offset's home city of Atlanta. "I feel like this is more like of an Atlanta thing, I don't know, a Georgia thing," she said.
She added that after Offset kept saying "up and stuck," she started repeating "up and a stuck out of nowhere."
It should be noted the phrase has featured in numerous songs by hip-hop artists prior to Cardi's use. According to Genius
, there had been close to 100 variations of the term before the release of "Up." Travis Scott, for instance, announces "It's up, it's stuck" at the start of his verse on the December 2019 Jackboys
track "Out West