Top Definition
someone who masturbates at their computer keyboard

Example for 'keystroker':

"Anyone leet is a keystroking fucktard."
by Figleaf23 August 05, 2007
1 more definition
A person who uses the internet to bolster their flagging self esteem usually by insulting others and/or making hateful throwaway remarks.

Not to be confused with Trolls, keystrokers are in fact capable of intelligent and constructive actions, they simply prefer to have fun at other peoples expense. Anyone objecting to this definition as being "hateful" may be doing so as a keystroking move.
ChatGod:"The shuitlle crash was so funny, I wet myself laughing!"
CovertWalrus:"You, ChatGod, are a keystroker. No doubt."
by D F Stuckey February 20, 2004

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