flubbing

Verb

flub (third-person singular simple present flubs, present participle flubbing, simple past and past participle flubbed)

1. (Australia, Canada, New Zealand, US, informal, transitive) To goof, fumble, or err in the performance of an action.
   • ‘Stage fright? So? What are you babbling ′bout? You′re mad as a snake!’
     ‘Ever since I was a kid. I was in the Christmas Pageant one year and flubbed my line.’
     ‘What was your line?’
     ‘I told you I flubbed it!’ he mouthed these words hysterically.2003, Trevor Pearson, Living Strictly fore! Pleasure, pages 88–89

See all 3 meanings of flub