1. flunk out : (因不及格使...)退学；
及物动词
不及物动词
1. 在(考试)中不及格;未通过(某一课程)
If you flunk an exam or a course, you fail to reach the required standard.
1. failure to reach a minimum required performance
e.g. his failing the course led to his disqualification
he got two flunks on his report
Synonym: failing