buff up

phrasal verb

Definition of buff up

: to become stronger and more muscular or to make (someone or something) stronger and more muscular through exercising and weight lifting She is buffing up for her role as a female boxer. He buffed himself up by going to the gym every day. often used as buffed-up buffed-up bodies

Comments on buff up

What made you want to look up buff up? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

an act or instance of returning to life

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!