The Collaborative International Dictionary
Derf
Derf \Derf\, a. [Icel. djafr.] Strong; powerful; fierce. [Obs.] -- Derf"ly, adv. [Obs.]
Wiktionary
derf
a. (context obsolete English) strong; powerful; fierce
Wikipedia
Derf
John Backderf (born October 1959 in Richfield, Ohio) is an American cartoonist known by the pseudonyms Derf and Derf Backderf. Derf is most famous for his recent graphic novels, especially My Friend Dahmer, the international bestseller which won an Angoulême Prize, and earlier for his comic strip The City, which appeared in a number of alternative newspapers from 1990–2014. In 2006 Derf won the Robert F. Kennedy Journalism Award for cartooning. Backderf has been based in Cleveland, Ohio, for much of his career.