fumble
Definitions
To use the hands clumsily while doing or handling something.
To fail to hold or catch a ball that is in play.
To make a mistake or handle a situation in an awkward or incompetent way.
Examples
The quarterback began to fumble the ball as he was tackled by the defensive line.
I watched her fumble with her keys while trying to unlock the front door in the dark.
It is easy to fumble your words when you are nervous about giving a public speech.