break in
To enter a place by force or illicit means.
(idiomatic) To reach a state of functioning more smoothly through use or wear; to cause (something, or someone, new) to undergo this change.
(idiomatic) Starting something brand new or at a new level.
(of a horse) To tame; make obedient; to train to follow orders of the owner.
(colloquial) To take the virginity of a girl, to deflower.
To interrupt one's conversation; speak before another person has finished speaking.
(slang) To initiate a new person into prostitution or prison sex acts.