doodle-bug (n.)youdaoicibaDictYouDict[doodle-bug 词源字典]
type of beetle or larvae, c. 1866, Southern U.S. dialect; see doodle + bug (n.). The same word was applied 1944 in R.A.F. slang to German V-model flying bombs. [doodle-bug etymology, doodle-bug origin, 英语词源]