hard sell

noun2

1. •
   A sales technique of pressuring the potential buyer to agree to a purchase.
2. •
   A sales transaction which is challenging for the sales person to make; any act or object of persuasion which is challenging.

   • Mr. Ignatieff's predecessor, Stéphane Dion, was a hard sell on the fundraising circuit, but so far, the new leader has proven to be a draw. — 2009