If you mean your driving learner's permit, it's no big deal, just go to the DMV and ask for a new one. Bring ID and a few bucks.
Apply for a replacement.
You no longer have a valid driving permit
If a job requires a work permit, then you cannot work there.
The permit expiration date is on the front of the permit.
Normally the permit is revoked. The driver must then retake the driver's test in order to obtain the permit again.
If you are caught driving in violation of the restrictions of your learners permit, you can have your privilege to drive suspended.
some people might die if they loose to much
If the permit is valid and you are complying with all the regulations a check may be made and nothing will happen
In many jurisdictions, if caught, you must purchase a permit at twice its normal cost.
you become gay
nothing
it will loose its magnesium