As a result of losing her lower jaw, her tongue just hangs loose from the hole where the start of the tongue come from, because she has no jaw to keep it. She didn't mind however as she got used to it. Here, she is flexing her long tougne, swing it left and right.

I think I should draw another version of her where she warps her tougne around her neck like a Greninja.

Jawless grovyle idea by https://www.deviantart.com/ingster

More grovyle art here: https://sta.sh/21eh5tuoktbn?edit=1