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general::
Phrase(s): flub something up
to mess something up; to ruin something. • I saw you play in the tournament last Friday. You really flubbed it up, if you don’t mind me saying so. • You really flubbed up the tournament., Phrase(s): flub up
to make an error. • I flubbed up again!
McGrawhill's American Idioms And Phrasal Verbs