French phrase
Faites comme chez vous !
Meaning
Make yourself at home!
When to use it
A welcoming invitation to relax and act as if at home. It is fairly polite and puts visitors at ease.
Example dialogue
Prenez quelque chose à boire, Faites comme chez vous !
Have something to drink. Make yourself at home!
Merci, je vais prendre un verre.
Thank you, I'll have a glass.