herbalist. f V. yerbero.yerbero, ra.1. m. and f. arg., Hond., Mex. and Peru. hierbero ( do healer ).2 m. and f. Cuba and Mex. hierbero ( do herbs 41 salesman;.3 f. wooden vessel or other material used to contain the yerba mate is primed with that and that usually is attached to another for sugar.