A hard sell is a method of selling in which the salesperson puts a lot of pressure on someone to make them buy something.
...a double-glazing firm whose hard-sell techniques were exposed by a consumer programme.
N-SING : oft N n
HARD SELL
Meaning of HARD SELL in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006