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   A fist bump (also called FTB, Pound, Knuckle Blaster, Bro Fist, Fist Pound, Fo' Knucks, Bones, knuckle bump, knuckle touch or Spud, Cuff and Safe (British slang)) is a gesture similar in meaning to a handshake or high five. A fist bump can also be a symbol of giving respect. It can be followed by various other hand and body gestures and may be part of a dap greeting. It is commonly used in baseball as a form of celebration with teammates, and with opposition players at the end of a game.

The gesture is performed when two participants each form a closed fist with one hand and then lightly tap the front of their fists together. The participant's fists may be either vertically-oriented (perpendicular to the ground) or horizontally-oriented. Unlike the standard handshake, which is typically performed only with each participants' right hand, a fist bump may be performed with participants using either hand. The fist bump symbol is written in text by using the Japanese katakana alphabet YO, the equals sign and the English capital "E": '=?E='.

http://en.wikipedia.org/wiki/Fist_bump

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