Green’s Dictionary of Slang

bug off! excl.

a euph. for bugger off! excl.

1963		A.E. Morgan Six-Eleven (1966) 196: If you’re too sensitive to appreciate that or accept it, bug off right now.
1972		B. Rodgers Queens’ Vernacular 110: Bug off, Louise; I’m looking for a husband.
1992		R.C. Cruz Straight Outta Compton 52: Bug off, you queer!
2000		Guardian G2 30 May 19: So bug off!