Topic: SPORT
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muff2 [transitive] informal
1 also muff something ↔ up to spoil a chance to do something well or achieve something : 
You'll probably only get one chance to take a photo, so don't muff it!
You'll probably only get one chance to take a photo, so don't muff it!2DS to fail to catch a ball or kick it properly in a game or sport : With only the goalkeeper to beat, he completely muffed his shot.
With only the goalkeeper to beat, he completely muffed his shot.3 if you muff your lines in a play you are acting in, you forget them or say them wrongly
