Ageusia is the term for loss of taste.

Traumatic damage to the olfactory nerve can cause of lack of smell but you would also need to damage the tongue for the taste.

You won’t do it from eating regular foods, but trying to eat a large enough firecracker might do the trick. It could take out both the tongue and the nerve.

Don’t do that though. It would probably blow the jaw off and make you blind as well.