All thumbs refers to someone who is physically awkward; clumsy.
Lacking physical coordination, skill, or grace.
Awkward in handling things; uncoordinated.
1. I wish I could play the piano but I’m all thumbs.
2. Gary tried knitting me a scarf but he’s all thumbs, it looked nothing like a scarf.
3. A: How are your drawing classes going?
B: Not so good, I’m all thumbs!
4. My cousin Kathy is all thumbs, she always knocks over a vase or breaks a plate at my grandmother’s house.
bungling, butterfingered, clownish, elephantine, graceless, helpless, incompetent, inelegant, inept, klutzy, maladroit, oafish, stumbling, two left feet, unable, uncoordinated, un-dexterous, unhandy, unskillful, untactful, untalented