What does out of habit mean?

What does the phrase 'can it' mean? How do you know if your silverware is real silver or plated and What is the market value on silver silverware? When signing party invitations does the husbands name go first. For example given by - Joe and Jane Doe or Jane and Joe Doe? How do you address an envelope to a dowager duchess? Is it acceptable to call people that have came from another country foreigners? Men wearing skirts? When your date arrived you were still getting dressed use a comma? What does 'Put your best foot forward' mean? What is a sentence using manner? Is Malvinder a man or a woman name? What is 'Merci à tous' when translated from French to English? What country do they greet by saying have you eaten? What does it mean when you call somebody a real heel? What does bonjour quoi de neuf mean? Who is mr and mrs newbit? What does set ways of doing things means? What is the difference men and women shirts? Why is a picnic called a picnic? What time to what time we can say good evening? How can you speak to someone in reference to a problem to your shoes?