Cow-handed

I have broken one of Grandmother's treasured ornaments. She will be furious with me for being so cow-handed.

Source: wiktionary

I don't know if he has told you, but his ankle has not healed as it should . . . the doctor who treated him originally was appallingly cow-handed! I sometimes suspect that his grace shares my own fear that it will never again bear his weight.

Source: wiktionary

She pulled up her pair with ease, wondering in amusement who could have been so cow-handed as to overturn a modest curricle on an even road with no other vehicles in sight.

Source: wiktionary

"Try not to be too cow-handed, Jerry," Mr. More remarked as his friend handed Lucy up. "What you mean is, try not to spoil your team too much," the other answered with a similar straight face.

Source: wiktionary