To expand on the above definition (absolutely hilarious, by the way), lego fingers may also include red palms and fingers, and/or itchy hands.
Friend: Man, why are your hands all red, and why do you keep scratching them?

Me: Dude, building that giant castle gave me an intense case of lego fingers.
by ISZK July 11, 2006
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When you have been playing with lego for an extended period of time, and your fingers start to hurt from the sharp edges.
After building the AT-AT walker, I had bad case of lego fingers.
by Soemundur November 17, 2004
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