bring on

verb4

1. •
   To make something appear, as on a stage or a place of competition.

   • The impatience here is palpable: 2000, here we come! Bring on Gore! Bring em all on! — 1998
2. •
   To cause.

   • Excessive drinking can bring on depression.
   • Does stress bring the headaches on?
3. •
   To hire or initiate a new employee or participant in a project.

   • I'll bring them on at the end of the month.
4. •
   (US, informal) To pose a challenge or threat; to attack; to compete aggressively.

   • Not that Briggs was capable of bringing it on. He got in, maybe, one really good shot: a right to Foreman's ample belly — 1997