Titty Teeth

Where a fully grown man or woman still has their baby teeth which makes their smile look almost cartoonish because they might still be sucking his mothers titties.

Dave: Hey Devin, I gotta ask bro, have you ever thought of going to the dentist to make your teeth closer together?
Devin: I have a condition where my baby teeth still haven't fallen out.

Dave: Oh you mean titty teeth?
Devin: I don't suck on my moms tits anymore you assclown.