Shwayne Booth Jr., known as S.mouse (later as S.mouse!), is a fictional character from the Australian mockumentary television series, Angry Boys. The character is portrayed by Chris Lilley, who wears a curly wig and blackface makeup. He has appeared in Angry Boys since the second episode. He is an African American rapper who lives in Calabasas, California. In the second episode, S.mouse is introduced as the rapper who just released the biggest selling hip-hop single of all time, "Slap My Elbow". Later in the show, S.mouse is put under house arrest at his parent's home for two months, after defecating on a police car in the music video for his single "Poo on You". He also gets dropped from his record label after another one of his videos, Grandmother Fucker, receives many complaints.

S.mouse has received a mixed response from critics. Paul Kalina of The Sydney Morning Herald has written that "S.mouse is arguably the new show's weakest incarnation", while Rowen Dean of ABC Online describes him as "Eminem meets Ali G meets Snoop Dogg".