mouse-finger 

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.

mouse-finger by Adam Wayne May 16, 2005

finger mouse 

insane childrens programme responsible for the gary glitter and jimmy saville experience.
see also BOD

richard gere: lets get finger mousing

finger mouse by matt devilstick September 28, 2003

mousefinger

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.

mousefinger by db208 January 16, 2011