Mainly a universal word for many other words,including serveral categories. Biff can be used at any age, as it is not profane or racial. This word can be said heard in the streets of Pennsylvania and hopefully spread further around the world. Biff substitutes for many slang terms used, or words you wish not to say in a conversation. Also a code name for unwanted words.
That hot chick has a nice BIFF!

Man, I was so drunk and horny last night, I biffed this random girl.

I'd like to order a Biff burger with biffy fries, and a biffshake.

Man this party was biff!

She just sucked his biff!

It more of a biffy decision whether I should see Spiderman or Xmen.

Shes in a biffy situation.

Let's all go to Biff steak and lube! (quaker steak and lube)

Come into Biffy Lube to get your oil changed.

Work was really biffy today, i need some rest.

I heard the baseball game was pretty biff last night.

We're going to this biff party tonight, I hear theres gonna be alot of Biffing there! Can't wait to Biff!

Yum, this biff sandwich is Biffilicious!!
by Roberto Alban June 3, 2004
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To lightly (or not so lightly) directly hit a person's forehead with the palm of the hand, usually in a playful way
"Oh c'mon...get outta here!" (biff)
by Prime December 23, 2002
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when someone messes up really bad

commonly used by ace s3 reign
"wow, darcie just biffed stunt two"

"hannah is a total biff"
by cheergurl123 April 22, 2017
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1. (noun) A man that is allergic to shoes, and thus requires allergy shots. Also, Biff's are notorious for low-nil-card-sliding and the accompanying facial expression of contempt for their competitors.
2. (verb) When going nil in Spades, the act of sliding a low card under all other cards of a trick, while simultaneously delivering a countenance of haughty contempt.
Damn, Biff's about to make nil with his shoes on and everything. Did you see when he Biffed that last trick?
by XPizzle June 19, 2008
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To the Longboarding community including a wide range of longboarders such as the hippie longboarder, to biff is to lose control of your longboard and fall off causing physical damage to one's self. Biff or 'Biffing' also relates to eating the pavement where one who falls off their longboard hits the ground face first, usually hitting their mouth on a concrete or paved surface (not to be confused with curb stomping).
I totally biffed on my longboard and took a mouthful of concrete.
by JohnnytheFLASH May 3, 2010
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