pachyderm

noun4

1. •
   (informal) An elephant.

   • Among five score pachyderm / Each canopied and passengered / Sit the duke and the duchess' luscious young girls — 2005
2. •
   (figurative) A person with thick skin; someone who is not affected by or does not care what others say about them.
3. •
   (figurative) Someone who is insensitive.
4. •
   (no longer used) A member of the obsolete taxonomic order Pachydermata, grouping of thick-skinned, hoofed animals such as the rhinoceros, hippopotamus, elephant and tapir.