Deleting an API is similar to updating—using QuerySet to find the affected documents and then chaining on a .delete() method to delete them:

>>> User.objects.raw({'first_name': {'$exists': True}}).delete()

BulkWrite API is still not supported at the time of writing this book (June 2017) and the relevant ticket, PYMODM-43, is open. Methods such as bulk_create() will, under the hood, issue multiple commands to the database.