to keep quiet about something
I heard Elaine's parents are out of town tonight and she's lonely! I'm gonna go over. Mums the word!
when you go around the mall looking through store windows and you stare at things but you don't actually buy stuff.
nt t th mall th th day bt snc ddnt' hav any mny jst nt nd shng
邮件由 email@example.com 发出。我们决不会发送垃圾邮件。