A phrase that consists of a verb with a preposition or adverb or both, the meaning of which is different from the meaning of its separate parts.
Phrasal Verb:
slip out
Meaning / Example:
1. [for someone] to exit quietly without bothering anyone. > I slipped out during intermission.
2. [for information] to be spoken without realizing that it is secret or privileged. > The secret about her divorce slipped out when we were discussing old friends.