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:
mark something up
Meaning / Example:
1. to mess something up with marks. > Don't mark up your book! > Who marked this book up?
2. to grade a paper and make lots of informative marks and comments on it. > The teacher really marked up my term paper.
3. to raise the price of something. > The grocery store seems to mark the price of food up every week.