ΘΔ - What does ΘΔ mean?

ΘΔ is slang for "Therian." See an example of how people use it.
When you see the symbol ΘΔ in someone's social media bio, it means they are a therian. You might see therians use this symbol on Twitter, TikTok, Instagram, and other platforms, to identify their kinship with an animal.

Vustex ΘΔ, technically a viking (@Vustex) / X

Adal🐺ΘΔ @AdalTheWolf@furry.engineer - Twitter Stats & Analytics

θΔ ꜰᴏxʟᴏʀᴇ ⨂ it/he's Profile

🇵🇸 🔪ravyn🩸ΘΔ🇵🇸 (@corvid_lenore) / X

nu metal doggirl listening to slipknot

cohost! - The bovigender moonifesto

Bayesian learning rules track the target weight and estimate

Thelema (θελημα) [93], meaning: “will, desire”, as EAN root of agape (αγαπη) [93], meaning: “love ❤️ , affection, liking, attraction” : r/Alphanumerics

Relative residual malaria transmission achieved with varying levels of

cohost! - i googled ΘΔ because i did not know it meant therian, and the first result was a slang.net definition page with this at the bottom