flunk verb definition in Exams and assessment topic from the Oxford Advanced Learner's Dictionary

flunk

 verb: Exams and assessment topic
1 [transitive, intransitive] flunk (something) to fail an exam, a test or a course I flunked math in second grade.2 [transitive] flunk somebody to make somebody fail an exam, a test, or a course by giving them a low mark/grade She's flunked 13 of the 18 students.