Bring it on.
"bring it on ""给自己鼓舞士气,给自己打气"
eg: At the start of the boxing match, the boxer yelled at his opponent to bring it on. 在比赛开始前,拳击手想对手大喊是为了给自己壮胆.
When the thieg was arrested, he wasn' t nervous, he actually shouted at the policemen to bring it on. 这个小偷被逮的时候他不但不紧张反而向警察大喊给自己壮胆.