A fork of Rural Dictionary
dogsbody n. (pl. -ies) Brit.
1 n. a servile worker, esp. at menial tasks; a hack.
v.intr. (often foll. by at) work slavishly (at menial, hard, or dull work).
2 Naut. slang a junior officer.
"Dogsbody" was the radio call sign for a famous WWII British fighter pilot during the battle of Britain. Like you it was derived from his initials: D.B.- Douglas Bader. As a Wing Commander he had his initials painted on his plane and given his own call sign.
What made him famous besides being a brilliant leader, shooting down 22 German planes, and escaping from prison camp twice, was he did this all on two artificial legs, having lost both in a plane crash years before the war. All in all quite a man to share a nickname with.