Student or Learner
What are similar expression to "know no shame"? I might be able to find them by searching on google, but many times hearing from teachers is more reality-reflecting.
at a free-sample stand
A: Shannon, let's try that sausage.
B: Come on, Paul! We've already tried 15 kinds of food here.
A: I know. But it's free anyway. Besides, this will be the last.
B: Oh, you surely know no shame in front of food.
Oh, you surely know no shame (demonstrate no restraint, don't hold back) in front of food.