Muscly or fit. When you've been working out and got well defined muscles you're looking buff.
Somebody: "Did you see The Who at Live Aid?"

Somebody else: "Yeah, Daltrey was looking quite buff!"
by Makeety Makondo July 23, 2006
to be large in quantity
The deal he got was buff
by sharelle September 19, 2003
The act of giving oral sex.
"That biznatch buffed me off last night, and I gave her an Alaskan Fire Dragon."
by Reesey December 03, 2002
Bare skin.
The state of being nude.
I like swimming in the buff.
Sunbathing in the buff is perfect to have a natural tan.
by Honey162004 October 24, 2010
To ingest drugs through the butt.
I want some mahldawg but it burns my nose and upsets my stomach. Get me the turkey baster I'm going to buff it.
by nutsmadeofcoco September 12, 2010
This is a covert (somewhat ironic) acronym. Buff actually stands for "Big Ugly Fat Fuck". Be careful when using this acronym. Most big ugly fat fucks already know they're nasty. So if they hear you call them a buff, they may think you're just being sarcastic and using the nomitive sense and definition of buff (i.e. muscular). This word is most effectively used when identifying a big ugly fat fuck who actually thinks he's got a body to be proud of. See also BIF
Bill: (Casually walking down the street chatting with his friend, Ted. Bill spots some fat nasty down the way.)

Bill: "Hey, Ted. Look at that fat nasty dude over there."

Ted: "Yeah, that guy is BUFF"
by jonsdedbro January 26, 2010
to sleep soundly or nap hard
I need to buff. I could use a buff. I just buffed for 2 hours.
"Mom I was in Buffington Colorado and you took me out, why?"
by maastricht group August 30, 2009
To upload a drug into ones anal cavity, such as ecstasy. In that case it would be called a butt roll.
Can I watch you buff that X up your ass, dude?
by JolliButtRoll December 09, 2008

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