breaking in

present participle and gerund of break in

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