Top Definition
1- gaining significant muscle mass
2- the act of drinking protein shakes, then hollaring "YEAH BEEF IT UP" , one may also do a series of push ups after drink has been chugged.
3- increasing anything in large amounts
Ouch, I was beefin' it up yesturday and I think I'm sick. YEAH BEEF IT UP!
by snuffalufagus November 21, 2007
5 Words related to beefin' it up

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.