Grumpy Cat is a female cat and Internet celebrity known for her grumpy facial expression. She has over 1 Million followers on Facebook and over 13 Million views on YouTube. Are you feeling Grumpy today? Let others know your mood with this Grumpy Cat coffee mug. This will sure to be a great collectible for those who love to be Grumpy. Make your friends, coworkers or family smile with this Grumpy coffee mug. The perfect gift for any Grumpy Cat fan, or anyone who is not a fan of mornings.