The Implant

A talking breast implant who shows up in a fantasy or dream sequence, cheerfully explaining her own existence with unbothered confidence. She's forthright about what she is and why she's there, treating a bizarre premise like the most natural thing in the world, needling the humans around her with blunt, knowing commentary.

Big Mouth thrives on giving voice to the unspeakable parts of adolescence, and an implant that talks back is exactly that kind of gag pushed to its logical extreme. Jenny Slate plays it with total sincerity rather than camp, which is what makes the joke land — she sounds less like a punchline than like someone with opinions.