break in

Short definition from Wiktionary

Verb

1. 1
   To enter a place by force or illicit means.
2. 2
   To reach a state of functioning more smoothly through use or wear; to cause (something, or someone, new) to undergo this change.
3. 3
   Starting something brand new or at a new level.
4. 4
   To tame; make obedient; to train to follow orders of the owner.
5. 5
   To take the virginity of a girl, to deflower.
6. 6
   To interrupt one's conversation; speak before another person has finished speaking.
7. 7
   To initiate a new person into prostitution or prison sex acts.

Noun

1. 1
   The act of entering a place with the intent to steal or commit some other offense; an instance of breaking and entering.
2. 2
   A novelty record where a question is asked or a comment is raised, and the replies are lyrics from other songs, sampled from the recordings.