Despite his rehearsals, his live presentation had a few flubs that he later corrected.

She flubs the opening lines of her speech every time, then laughs it off.

She walked onto the stage, apologizing for flubbing her opening lines but smiling and continuing.

She flubbed the audition, but she learned from the mistake.

Her flub during the presentation cost the team a crucial client.

I couldn't afford to flub the presentation, so I rehearsed every slide until the words came naturally.

I really flub up when I try to give a speech without practicing.