overselling

/OW1 V ER0 S EH0 L IH0 NG/
verb
  1. 1

    To agree to sell more of something than one can supply.

  2. 2

    To be too eager in attempting to sell something.

  3. 3

    To praise something to excess.

  4. 4

    To sell for a higher price than; to exceed in sale price.

Source: https://en.wiktionary.org/wiki/oversell, https://en.wiktionary.org/wiki/overselling