A TikTard is someone who has an obsession with making Tik Toks. If you have 50+ posts on Tik Tok, congratulations, you're a TikTard. If you say you only make Tik Toks "for the memes", but you have more than 50 Tik Toks, you're still a TikTard.
Oh, that weirdo, John has 300 posts on Tik Tok, and posts new ones every day! You can say he's a major TikTard!