Clayface
Definition
A shape-shifting supervillain from the DC Comics Batman universe, typically composed of a malleable, clay-like substance that allows him to alter his appearance, size, and form at will.
Any of several iterations of the character (e.g., Basil Karlo, Preston Payne), known for their tragic backstories involving disfigurement and obsession with acting or identity.
Examples
In the latest Batman reboot, Clayface steals the show by impersonating half of Gotham's A-listers—talk about method acting gone gooey.
After a bad spray tan, he looked less like a movie star and more like Clayface auditioning for a horror flick.
My doughnut dough rose so unevenly, it morphed into a Clayface wannabe right before my eyes.
Don't trust that salesman; one minute he's your buddy, the next he's pulling a Clayface and changing his pitch entirely.