Top Definition
Someone who on an instant messaging service will mess with you and act all tough but in real life, he is a shy little boy who doesnt want to fight with anyone
Luke:John was dissin' me on MSN two nights ago but last night he didnt say a word to me.

Grant:Yeah. What a keyboard gangsta.
by Luke Sweeney June 22, 2006
5 Words related to Keyboard Gangsta

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