BTO noun an influential and admired person US,1944 A “big-time operator”–not without overtones of smarminess.
— Cosmopolitan, p. 76, October 1949
We’d raced tanks down hills, chased big-time operators (BTOs) who tried to screw us in our small-time forays into the black market, fought in the TRUST 15th Tank Company smokers[.] — David H. Hackworth, AboutFace, p. 219, 1989