If you haven't seen grumpy cat yet, he is this unfortunate guy with a permanently grumpy look on his face. This being the internet, it was only a matter of time before his photos went viral and grumpy cat started popping up everywhere in memes.

Here are some of our favorites. Click on the images to open the grumpy cat memes up in full size.

Everybody loves a good meme... They are taking over the internet!

Below you can see some of our favourite chemistry cat memes!

Click on a photo to scroll through the gallery and read the jokes :) 

Who was it that said "life imitates art"? Well here are some cats imitating art... Enjoy!

Cats... Sneaky!!