Top Definition
The inability to type intelligible words or sentences, particularly on a smart phone device. This inability stems from a number of factors to include: 1). Your fingers are too fat to operate the device properly. 2). You are too drunk to operate the device properly. 3). You just don’t know how to spell or type to begin with.
WTF was that message you sent me, I could not understand it. You must have had a serious case of Groos-Fingers.
by McPeePee November 05, 2010

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