Phrasal verbs are compound verbs that result from combining a verb with an adverb or a preposition. The resulting compound verb is idiomatic.
Phrasal Verb:
shake someone down
Meaning / Example:
1. to blackmail someone. (Underworld.) > Fred was trying to shake Jane down, but she got the cops in on it. > The police chief was trying to shake down just about everybody in town.
2. to put pressure on someone to lend one money. > We tried to shake down Max for a few hundred, but no deal.
A phrase that combines a verb with a preposition or adverb or both and that functions as a verb whose meaning is different from the combined meanings of the individual words.