From Longman Dictionary of Contemporary Englishmug up phrasal verb British EnglishinformalSESTUDY to try to learn something in a short time, especially for an examination SYN swot up on Jeannie can’t come. She’s busy mugging up on science for her exam.mug something ↔ up Mug up as much as you can about the country before your trip. → mug→ See Verb table
