butter-fingered

Butter-fingered describes someone prone to dropping things or fumbling objects, as if their fingers were slicked with butter and couldn't maintain a grip.

The term is most often applied to athletes who fail to catch balls or hold onto equipment: The butter-fingered receiver cost us the game.

Outside sports, it characterizes general clumsiness with hands.

The noun form is butterfingers, often used as a teasing epithet for someone who has just dropped something.