flunk /flʌŋk/ verb informal especially American English
[Date: 1800-1900; Origin: Perhaps from flinch + funk 'to be afraid (of)' (18-21 centuries); ⇒ funk(2)]

1. [intransitive and transitive] to fail a test:
Tony flunked chemistry last semester.

2. [transitive] to give someone low marks on a test so that they fail it Synonym : fail:
She hadn’t done the work so I flunked her.
flunk out phrasal verb informal especially American English
to be forced to leave a school or college because your work is not good enough
flunk out of
Ben flunked out of college.

[TahlilGaran] Dictionary of Contemporary English ▲