It's not a word, it's a proper noun. It's like "Panda Banker". Cybercrime groups often don't choose the name, so security researchers coin one to talk about them in articles. Here's an explainer I found "Spamouflage, also known as Spamouflage Dragon, or DragonBridge, is a Chinese propaganda network that has been fully active on social media platforms since 2017-18. Spamouflage refers to deceptive practices that attempt to hide or blend spammy content within legitimate or inconspicuous contexts. It’s like spam wearing a disguise, trying to sneak past filters or appear less suspicious."