You should be ashamed. Whoever taught you kung fu sure is a lousy master. You are a disgrace.
10 seconds sound clip from the Sleeping Fist (1979) movie soundboard.
You can hear this line at 01:03:34 in the DVD version of the movie.
Quote context
[...]
- I guess you must be a lousy teacher.
- First-class teacher, first-class student.
- We'll soon find out who's first class around here.
- If you like, I'll use just one hand. All right? That's fair, isn't it?
- You should be ashamed. Whoever taught you kung fu sure is a lousy master. You are a disgrace.
- Master, they've been making trouble.
- You're just a kid. You sure do know your kung fu.
[...]