The Official Grumpy Cat

6 Subtle Signs Your Cat is Secretly Mad At You – Meowingtons

Grumpy Cat - Wikipedia

Angry Cat: 14 Signs Your Cat Is Mad at You — Fighting Cats

5 Myths About Your Angry Cat and How You Can Help - PetHelpful

8 Signs Your Cat Is Secretly Mad At You That Are Super Subtle

angry cat eyes by eaglehaast on DeviantArt

Could this grouchy Instagram star be the next Grumpy Cat?

Grumpy Cat wins copyright lawsuit

Grumpy Cat made nearly $100 million? Not quite, owner says.

4,980 Angry Cat Stock Photos, High-Res Pictures, and Images - Getty Images