Football dressing blunders

blunder |ˈbləndər|
a stupid or careless mistake.

-verb [ no obj. ]
make a stupid or careless mistake; act or speak clumsily: the mayor and the City Council have blundered in an ill-advised campaign | I blundered on in my explanation |

• move clumsily or as if unable to see: we were blundering around in the darkness.

-adjective: blundering actors.

blunderer noun.
blunderingly adverb