butterfingers

Meanings

1. Someone who tends to drop things; (more generally) someone who is clumsy or uncoordinated; a klutz.
2. One's fingers which tend to drop things, or are clumsy or uncoordinated.
3. A tendency to drop things, or to be clumsy or uncoordinated.

Etymology

From butter + fingers (suggesting that someone is clumsy and drops things as if their hands are coated in slippery butter), from butterfingered.