Can the tooth under a dental crown wiggle slightly?

Some dental glue for crowns create resistance and retention upon compression, while some are manufactured to form stable chemical bonds. The chemically bonding glues provide the unbreakable connect and are recommended in severe cases. For instance, those with the habit of grinding their teeth will find this chemically bonded glue to be more helpful than the other category.

All teeth have some give to them. But its not something that should be super noticeable. If you have had the crown for a long time then I would get the tooth looked at. Crowns don't last forever.

Hope that helped =)