/flungk/ , v.i.
1. to fail in a course or examination.
2. flunk out , to fail and be unable to continue in: He flunked out of flight school.
v.t.
3. to fail to get a passing mark in: to flunk math.
4. to give a failing grade to; remove (a student) as unqualified from a school or course.
n.
5. a failure, as in a course or examination.
[ 1815-25, Amer.; perh. akin to FLINCH 1 , FUNK 1 ]