noun / verb
muff
MUFF/mˈʌf/
A mistake made through clumsy handling or performance.
Her muff of the catch lets the softball slip between her hands.

Etymology
The verb and mistake noun developed from the slang label for an awkward person. Its possible connection with the hand-warmer remains uncertain.
In context
might muff the ball if they don't secure it properly.
More examples
- I muff my opening line and start again.
- He muffed the catch, and the ball rolled away.
- They keep muffing the simplest steps in rehearsal.
Forms
muff · muffs · muffed · muffing