buff up
phrasal verb
buffed up; buffing up; buffs 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-upbuffed-up bodies
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Cite this Entry
“Buff up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/buff%20up. Accessed 31 Dec. 2024.
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