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:
jerk something up
Meaning / Example:
1. to pull something up quickly. > He jerked his belt up tight.
2. to lift up something, such as ears, quickly. > The dog jerked its ears up. > The dog jerked up its ears when it heard the floor creak.