I just ate a whole wheel of brie and I feel sick

Could be taken to mean eat cheese and also eat sin. Is eating sin like a devil's food cake maybe?. Or maybe something sinful like shark fin soup or foie gras.

My mate has this tattooed on his thigh, I've no idea why.

Agreed.

This meme is 🐁🤌

I'm lactose intolerant so it would be more like "eat cheese and sit"