Biff 

To smack someone in the back of the head with your hand flat. Just a little hit for something you did that was a mistake, dumb or uncalled for.

Biff him if he's not telling the truth.

Biff by Cassandrajane March 29, 2009

Biff 

Something that is really cool, something awesome and stellar

Whoa that movie was so biff!
How are u doing?, im doing pretty biff!

Biff by Biff12345678 October 21, 2012

Biff 

To throw or discard something

"hey, biff this wrapper in the garbage for me"

Biff by CarolinelizabetH October 27, 2008

BiFF 

A secret society, who meets to practice and discuss an ancient Armenian philosophy of the same name, little known to outsiders.

Biff reveals the combined knowledge of the last 4,000 years
OR
It is believed that the Biff elders held the Biff meeting in Isfahan, but this is only a suspicion.

BiFF by Virlm February 7, 2009

BIFF 

acronym for bone idle fat fucker. This species of man is a leach, takes everything with no thanks, but expects thanks for giving everything

Oi wake up ya BIFF it's 5pm, and ya still owe me £300

BIFF by SLYTH LORD October 13, 2004

Biff 

To accidentally exhale when taking a hit from a bong or marijuana pipe, causing the weed to fly out of the device.

Dude, you biffed it! Now we gotta pack it again and there's a burn mark in the carpet. Good one, asshole!

Biff by John October 12, 2003

biff 

The main character in the book, Lamb The Gospel According to Biff, Christ's Childhood Pal. He invented sarcasm.

"La-la-la. Hey Roman guy, too bad about your getting stabbed. La-la-la. It's probably not a message from God or nothing. La-la-la. Telling you that maybe you should have gone home, la, la, la. Instead of oppressing the chosen people who God hisownself has said that he likes better than you. Fa, la, la, la." -Biff, when distracting a Roman gaurd so Jesus could bring a man back from the dead when they were young.

biff by Cricket June 19, 2004