What's with the Greenberg Glusker meme?

I've noticed on Legal Cheek (I know) a lot of memeing about Greenberg Glusker but have no idea how this came about. It's usually sarcastic comments from people pretending to work there saying that it's a 'top top titan' and how 'titanic' the pay is. There hasn't been a single article on the firm published on that site and it seems completely irrelevant to the UK. Why are they taking the piss out of this firm of all firms?