hard sell

1. Aggressive, high-pressure selling or promotion.
2. A person or organization that resists pressure from salespeople; a difficult sales prospect.

Aggressive sales practices aimed at pressuring a customer into completing a transaction quickly.
Example: The agent was a proponent of the hard sell. Accordingly, he tried to give buyers the impression that the home would be available for only a short period, that the deal offered might be withdrawn any time, and that they would not be afforded the opportunity to think over the decision.

1.  An aggressive, high-pressure sales practice or promotion, as in Used-car salesmen tend to give you a hard sell. This expression gave rise to the antonym soft sell, a low-key sales approach that relies on gentle persuasion. [Colloquial; c. 1950]
2.  A difficult sales prospect, one who resists sales pressure. For example, Those brokers who call us at dinnertime find me a hard sell--I usually just hang up on them. [Late 1900s]

The noun has one meaning:

Meaning #1: forceful and insistent advertising