A cheeky humorous description

There are many humorous sayings to describe a person's thick skin, such as:

1. This person is as thick-skinned as an unopened phone book, indicating that this person doesn't care about other people's opinions at all, and he is particularly thick-skinned.

This person's skin is as thick as bacon, which means that this person's skin is thick and it is difficult to be touched or moved.

This person's skin is as thick as a brick, which shows that this person's skin is hard and not easy to break and hurt.