1
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Phrase(s): Bag it! [and] Bag your face!
Sl. Be quiet!; Shut up and go away! • Mary: Sally, you look just terrible! What happened? Sally: Bag it! Mary: Sorry I asked! • Bill: Did I ever tell you about the time I went to Germany? Sue: Give it a rest, Bill. Bag it! • Sue: Can I borrow your car again? Mary: Bag your face, Sue! Sue: Well, I never!
McGrawhill's American Idioms And Phrasal Verbs
2
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1. Pack things in a bag, as in "Please bag it," the customer said to the checkout clerk. This usage mainly describes packing groceries or other purchases into a bag. [Colloquial; late 1500s] 2. Abandon something or someone, quit. For example, The class is not very good, so I've decided to bag it. This idiom first became widespread among students. [Colloquial; 1960s] 3. Be quiet, stop doing something, go away. For example, I've heard enough about that, so just bag it! [Slang; 1960s]
American Heritage Idioms