A token that is a likely rug-pull because its defects are not well known to users.

A token with fundamental tradeoffs that are not being made clear to potential investors. I think you could argue that things like fartcoin aren't Shitcoins. They are showing their hand and saying "this is basically a scam, but if you time it right you could be rich" The worst shitcoins are those...

No purpose... a rug pull. Won't be here in 100 years.

A shitcoin cannot explain what it measures; the quantized architecture of time, memory, causality with respect to energy and entropy. A shitcoin is a monetary token created after eternal ledgerized memory has already been instantiated.