verb (informal, especially AmE)
1 to fail an exam, a test or a course:
[VN] I flunked math in second grade. [also V]
2 [VN] to make sb fail an exam, a test, or a course by giving them a low mark/grade:
She's flunked 13 of the 18 students.
PHRASALVERBS
flunk out (of sth) (AmE, informal) to have to leave a school or a college because your marks/grades are not good enough:
He flunked out of college after four semesters.
