Christopher John Millar (born 30 July 1955), known by his stage name Rat Scabies, is a musician best known as the drummer for English punk rock band the Damned.

His solo work outside the Damned includes a cover version of Bob Dylan's "This Wheel's on Fire", credited to "Rat & The Whale".

In recent times, he has played with Donovan, Nosferatu, ska artist Neville Staple (formerly of the Specials) and his band, Dave Catching (Eagles of Death Metal), Chris Goss, the Members, the Mutants, the Spammed, Urban Voodoo Machine and Jane Horrocks.

[5][6] In February 2024 The Damned announced that for the first time in 35 years they would be doing a ten date North American tour featuring their 1980's lineup of Scabies, Dave Vanian, Captain Sensible and Paul Gray.

[7] Millar lives with his wife Viv and their three children in Brentford, and is the central character of the book Rat Scabies and The Holy Grail, written by former music journalist Christopher Dawes.