What is a “51% spawn camp attack”, and is it any different from a normal 51% attack

Question

What is a "51% spawn camp attack", and is it any different from a normal 51% attack. Saw this mentioned in this tweet from Vitalik.

Is there a distinction that I am missing?

Answer 1

A month prior to the tweet you mention, Vitalik had tweeted the following:

Suggested vocabulary item: spawn camping attack. When a 51% miner cartel keeps attacking over and over again, rendering the chain useless.

So technically no different to your bog-standard 51% attack, it's just repeated ad infinitum. (Or at least until some point when further attacks are considered unnecessary.)