extremely embarrassing or inept, maybe not dextrous All thumbs features constantly meant clumsy, but it has actually brand-new meaning in age of hand-held smart phones. The definition of today relates to an undesirable speller in text responses. Given the relative small size of keyboards, therefore the undeniable fact that people are texting just with thumbs, this may result in many typos. These typos tend to be compounded with auto-correct, making all of them worse. 'All thumbs' generally seems to plague guys with huge fingers a lot more than ladies.