Definition of "buff"
buff1
/bʌf/
noun
countable and uncountable, plural buffs
(informal) A person who is very interested in a particular subject.
verb
third-person singular simple present buffs, present participle buffing, simple past and past participle buffed
buff2
/bʌf/
buff3
/bʌf/
buff4
/bʌf/