flub

 
Pronunciation: /flʌb/
North American informal

verb (flubs, flubbing, flubbed)

[with object]
  • botch or bungle (something): she glanced at her notes and flubbed her lines

noun

  • a thing badly or clumsily done; a blunder: the textbooks are littered with flubs

Origin:

1920s: of unknown origin