muff 1 
(mŭf)
(mŭf)v. muffed, muff·ing, muffs
v.tr.
1. To perform or handle clumsily or ineptly; bungle. See Synonyms at botch.
2. Sports To fail to make (a catch).
v.intr.
To perform a task clumsily or ineptly.
n.
1. A clumsy or bungled action.
2. Sports A failure to make a catch.
[Origin unknown.]