Mum

1) To keep silent.

2) A way of referring to your female parent in Britain, Australia, New Zealand and South Africa.

3) Mum can be used sarcastically towards friends when they're being demanding, controlling or oppressive.

Note: Americans and Canadians refer to their mum /muhm/ as mom /ma·ah·m/.

1) Dad: Mum's the word.
*child makes a zipping motion across lips*

2) Lost girl says to sales assistant, "My mum is wearing a purple dress."

3) Friend: Wake up!
Me: Yes mum.