Top Definition
A typographical error made while using thumbs only to text mesage. Similar to a typo, or typographical error.
Did you mean to write guck you? No, sorry, that was a thumbo.
av The Pigfarmer's Grandson 3 oktober 2009
Refers to a clumsy person with a distinct lack of coordination with his hands.
He's such a thumbo, he cant catch a pass to save his ass.
av upriverman 2 mars 2004

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