The term 'Be All Thumbs' is an idiom which means to be clumsy or awkward. It is derived from the idea that someone who is clumsy or awkward would have difficulty performing a task with their hands, as if they had thumbs that were too large or too small. The crossword solutions for this term are TEXT (4 letters) and BUMBLE (6 letters). TEXT is a noun meaning written words, while BUMBLE is a verb meaning to move in an awkward or clumsy manner.