buyer's remorse - definition and synonyms

noun
  1.   From our crowdsourced Open Dictionary
    1
    a feeling of regret or guilt after you have bought something expensive, e.g. a car or a house

    We’ve all experienced buyer’s remorse in the past. It’s not a fun feeling and you want to make sure you’re doing everything you can to prevent post-purchase regret in your own customers.

    Submitted from United Kingdom on 27/06/2016
  2.   From our crowdsourced Open Dictionary
    2
    a feeling of regret after a big decision with serious consequences has been made

    Britons who voted to leave the European Union this week may be experiencing a bit of buyer’s remorse in the wake of the meltdown Friday on global stock exchanges and calls by the founding members of the EU not to let the door hit the island nation on its way out.

    Submitted from United Kingdom on 27/06/2016