French phrase
Servez-vous, je vous en prie.
Meaning
Please help yourself.
When to use it
A polite invitation to take something freely. It is common when offering food, drinks, or materials, with a courteous tone.
Example dialogue
Servez-vous, je vous en prie.
Please help yourself.
Merci beaucoup, je vais en prendre une.
Thank you very much, I'll have one.