a. 笨手笨脚的

[ adj ]
lacking physical movement skills, especially with the hands
<adj.all>
a bumbling mechanica bungling performance
ham-handed governmental interference
could scarcely empty a scuttle of ashes, so handless was the poor creature

ham-fisted \ham-fisted\ ham-handed \ham-handed\adj.
not skillful in physical movement especially with the hands;
clumsy; bungling; -- also used metaphorically of actions; as,
ham-handed governmental interference.

Syn: bumbling, bungling, butterfingered, handless,
heavy-handed, left-handed.
[WordNet 1.5]