Here's a phrase I never expected to encounter, as in, "it never occurred to me to combine these words":

"suctorial lips"

And today I learned that there is something called a 'cookiecutter shark' - via wikipedia - Suctorial pertains to the adaptation for sucking or suction, [1] as possessed by marine parasites such as the Cookiecutter shark.

Eeee, you found it exactly where I did.