mook (m__k) n. Slang 1. An insignificant or contemptible person. Members: Vocals, Guitar - Paul Dano Keyboards - Dan Kreiger Bass - Rob Bruce Drums - Gus Johnson Sound: Mook’s approach to music relies on seamless dichotomies of musical arrangement. Each song juxtaposes a number of influences in a natural and modest way. This allows for greater accessibility and application of the proper hooks. Mook’s lyrical output is that of the persona of the band itself, musically serious yet artistically playful.