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In computer video game terminology the mouse-finger is the dominant, or preferred, finger the video game player uses to wield their most valuable implement of destruction, i.e. the computer mouse. Without one's mouse-finger one is completely helpless.
Joe: *Crack* Damn!
Mike: Hey Joe, why the expletive?
Joe: I just broke my mouse-finger. I won't be able to finish the Unreal Tournament.
Joe: Your passing will be remembered in our myths and legends for years to come. Rest in peace.
by Adam Wayne May 13, 2005
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using ones forefinger to point out things on a computer screen.
caleb was trying to show me something on the screen on youtube. he used his mousefinger to point it out to me.
by db208 January 15, 2011
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