The line comes from SpongeBob SquarePants, the Nickelodeon cartoon that premiered in 1999, where SpongeBob repeats I'm ready while racing to his job at the Krusty Krab. Voiced by Tom Kenny, it became one of the character's defining catchphrases and appeared across episodes, games and merchandise. Online, the clip spread on soundboards and in meme edits as a shorthand for eager confidence, often paired with rushed morning routines, gaming starts and ironic challenges where someone is far less prepared than they claim.