be all fingers and thumbs
US /bi ɔl ˈfɪŋɡərz ænd θʌmz/
UK /bi ɔl ˈfɪŋɡərz ænd θʌmz/

1.
손이 둔하다, 서투르다
to be clumsy or awkward with your hands, especially when trying to do something that requires fine motor skills
:
•
I'm usually good with crafts, but today I'm all fingers and thumbs.
평소에는 손재주가 좋은데, 오늘은 손이 둔해.
•
He was so nervous that he was all fingers and thumbs when trying to tie his shoelaces.
그는 너무 긴장해서 신발 끈을 묶으려 할 때 손이 둔해졌다.