Gaby Hoffmann (née Hauke; born in Berlin, Germany) is primarily known as songwriter under the pseudonym Deaffy and manager for the heavy metal band Accept. She has also contributed cover art concepts, marketing ideas for the band and even stage moves and wardrobe. She is married to their guitarist Wolf Hoffmann.
Accept hired Gaby Hauke as their manager in 1981, after releasing Breaker. She secured a spot supporting Judas Priest on their World Wide Blitz Tour the same year, and is credited for songwriting for the first time on Accept's next album Restless and Wild (1982). She is credited as lyricist on all songs on their albums from Balls to the Wall (1983) to Death Row (1994), with the exception of two instrumentals on Death Row. She's credited on several songs on Predator (1996). Since 2010, Accept's new vocalist Mark Tornillo has been credited for their lyrics, although Tornillo has acknowledged her ongoing influence when discussing the title track from Stalingrad (2012) and their 2014 album Blind Rage.
Hoffmann is credited for the cover art concept for Balls to the Wall, Metal Heart and Russian Roulette, as well as their 2014 album Blind Rage.
Hoffmann is credited for the cover art concept for U.D.O.s 1988 album Mean Machine as well as songwriting on their 1987 album Animal House and their 1991 album Timebomb under the Deaffy pseudonym.