Green’s Dictionary of Slang

(US) a pimp working with high-class prostitutes.

1966		Trimble 5000 Adult Sex Words and Phrases 11: account executive (Sl.) A Pimp working for expensive Call Girls.
1972		R.A. Wilson Playboy’s Book of Forbidden Words 13: Account Executive In New York and Hollywood slang, a pimp who specializes in high-priced call-girls.
1986–7		Maledicta IX 148: The compilers ought to have looked farther afield and found: […] account executive (procurer of expensive call girls).