Idiom of the day :- Button one’s lip

Usage, examples and definition of the Idiom :-

‘There’s an important football game on television tonight,’ Mr. Bush said to his wife. ‘Could I ask you to button up while I watch it ?’ ‘Sure, I’ll be glad to button my lip — if you’ll agree to wash the dishes after supper,’ she replied. Both these slang expressions mean to keep quiet, to stop talking.