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
Phrasal Verb:
jam something up
Meaning / Example:
1. to clog up something; to impede or block the movement of or through something. > Rachel jammed traffic up when her car stalled.
2. to force something upwards in haste or anger. > Who jammed the window up?
Phrasal verbs are multi-word verbs that, like single-word verbs, convey action of the body or mind or occurrences. Phrasal verbs consist of a basic verb + another word or words, usually a preposition or adverb. Example: speak (basic verb) + up (preposition)