Definition of fumbles:
(v) :
(transitive, intransitive) To handle nervously or awkwardly.
(v) :
(transitive, intransitive) To grope awkwardly in trying to find something
(v) :
(intransitive) To blunder uncertainly.
(v) :
(transitive, intransitive, sports) To drop a ball or a baton etc. by accident.
(v) :
To handle much; to play childishly; to turn over and over.
(n) :
(sports, American football, Canadian football) A ball etc. that has been dropped by accident.