Moistboyz is an American hard rock band formed in New Hope, PA in 1991 by Guy Heller and Mickey Melchiondo. Moistboyz music is typically fast paced punk/metal, combining stream-of-consciousness lyrics with aggressive rock guitar riffs. The band's current touring lineup includes Stephen Haas (guitar), as well as Mondo Generator rhythm section Nick Oliveri (bass) and Hoss Wright (drums).

As in Melchiondo's band Ween, both he and Heller assume aliases: Mickey Moist and Dickie Moist.