Here are some possible interpretations:
* "Be quiet" or "Be still": This is the most common meaning of "fais petite" in everyday speech. It is used to tell someone to be quiet or to stop moving.
* "Make yourself small": This interpretation emphasizes the physical action of making oneself smaller, for example, crouching down or shrinking back.
* "Be humble" or "Be modest": This interpretation is more metaphorical and suggests that someone should be less arrogant or boastful.
Without further context, it's difficult to give a definitive translation.
Please provide more information about the situation in which you heard this phrase. For example, who said it, to whom, and in what context? This will help me to understand the intended meaning and give you a more accurate translation.