Also meaning butt in front but it can also mean Butt in Face.
He leaned over right in front of me and it was total BIF.
by Nun-yaB March 27, 2005
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Brilliant Idea Fairy; the imbecile who doesn't help a situation and can actually make things worse. He or she will suggest ideas that are impractical, implausable or impossible. Most often found where senior management hasn't a clue and no experience and is directing operations.
BIF is very similar to the owner of a MBA with no practical work experience in the job you are performing who is attempting to make your job more productive.
by Crazy Q January 30, 2013
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To fall on your face or in an absolutely ridiculous fashion, often suffering and being badly injured in the act.
Boy runs into a tree and breaks his leg.
"Wow, that kid totally biffed it!"
by Shelista February 2, 2009
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To fall on your ass, like a clumsy fool
"Dude i was like grinding like nobodys business when I just biffed it"
by Anonymous July 11, 2003
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trying to be smoothe, or impress someone.... and you fall and make yourself look like an ass..
by kj March 1, 2005
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when some ones boob is in your face (also can be applied to butt in face)
Stephanie: *bends over*
Camila: whoa man total BIF
by Giaretta de la Sol November 11, 2009
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An Auto-Antonym, can mean to do something with great vigour or with little enthusiasm. Context specific.

1. To attack something with vigour. Evolved from the noun Biff meaning a sudden sharp blow or punch

2. To have sex very enthusiastically. Linked noun Biff.

3. To stroll about meaninglessly. Origin unknown.
1. Brigadier Ben Ritchie Hook in Evelyn Waugh's Sword of Honour Trilogy: "Time for a Spot of Biffing!" (In reference to attacking the Enemy during the Second World War, immediately before he storms a pill box, alone, armed only with a machine gun and grenades)

2.
D: "I heard you biffing last night O, keep it down next time"

O: "Sorry D, I had no idea I was so loud."

D: "Its alright man. It was pretty funny actually, you sounded like a cavalry charge"

3.
D: "How was your day?"

O: "It was okay I guess. I biffed around town for a bit, but it was pretty pointless"
by Lordy_UK March 31, 2010
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