to me shitcoin is a coin that has no real use. The coin thrives on speculation and market manipulation. like meme coins, coins like doge, shiba, and others are one of the shitcoins. The coin thrives on the influence of influencers and repeated market speculation. shitcoin is so bad and littering the crypto market, it will just be a dump when the time comes.
indeed the term shitcoin is usually pinned to a meme coin, but for doge an exception, the achievement of doge some time ago provided several benefits for the holder, beyond the effect of Elon deliberately making a pump.