From Longman Dictionary of Contemporary Englishbe all fingers and thumbsbe all fingers and thumbsBritish EnglishCLUMSY to use your hands in an awkward or careless way, so that you drop or break things → finger
Examples from the Corpus
be all fingers and thumbs• She was all fingers and thumbs - and worry.be all fingers and thumbsbe all fingers and thumbsBritish English, be all thumbs American English informalCLUMSY to be unable to do something in which you have to make small careful movements with your fingers Would you do up these buttons for me? I seem to be all thumbs today. → thumbExamples from the Corpus
be all fingers and thumbs• She was all fingers and thumbs - and worry. 