all thumbs, to be

be all thumbs

To be uncoordinated or clumsy with one's hands. My mother does beautiful calligraphy, but I'm all thumbs—I can barely hold the pen!
See also: all, thumb

be all ˈthumbs

(also be all ˌfingers and ˈthumbs) be unable to hold something without dropping or damaging it; be clumsy: He’s all thumbs when it comes to fixing machines.
See also: all, thumb

all thumbs, to be

To be clumsy. The locution was already considered proverbial in John Heywood’s collection in 1546 (“When he should get ought, eche fynger is a thumbe”) and has been repeated countless times since.
See also: all