big money

noun
  1. 1

    A large amount of money, especially a significant source of revenue or income.

  2. 2

    Large corporations, or corporate interest generally, seen as exerting political influence and prioritising profits over other political concerns.

adjective
  1. 1

    Involving or transacting a large amount of money.

Source: https://en.wiktionary.org/wiki/big%20money