bring on

动词 Verb

(idiomatic, transitive) To cause.
(idiomatic, transitive, usually "bring it on") To make something appear, as on a stage or a place of competition.
(idiomatic, intransitive, US, informal, often as imperative) To pose a challenge or threat; to attack; to compete aggressively.
(slang, transitive) To hire or initiate a new employee or participant in a project.