Puscifer (pronounced /ˈpʊsɨfɚ/) is a side project of Maynard James Keenan from the bands Tool and A Perfect Circle. As Keenan is the only permanent member, Puscifer could also be considered a pseudonym for his solo work.
Puscifer's original name was Umlaut, "a premiere improvisational hardcore band." The name "Puscifer" was first publicized as a fictional band in the first episode of Mr. Show, including Keenan and Adam Jones as members. Jones is not associated with Puscifer otherwise, although artwork by Jones has been featured on Puscifer apparel (the "Your Mom's a Bitch" shirt, specifically).