"sodomite," 1550s, earlier "heretic" (mid-14c.), from Medieval Latin Bulgarus "a Bulgarian" (see Bulgaria), so called from bigoted notions of the sex lives of Eastern Orthodox Christians or of the sect of heretics that was prominent there 11c. Cf. Old French bougre "Bulgarian," also "heretic; sodomite." Softened secondary sense of "fellow, chap," is in British English from mid-19c. Related: Buggerly.
to commit buggery," 1590s, from bugger (n.). Meaning "ruin, spoil" is from 1923. Related: Buggered; buggering.
To leave; depart; fuck off •Often a contemptuous command; rare in US, although adopted by the Air Force in the Korean War: Pay no attention to my piteous Don'ts, but bugger off quickly (1920s+ British)