As an adjective slithery
is that slithers; that moves like a snake.
As a verb slithers is
That slithers; that moves like a snake.
To move about smoothly and from side to side.
* 2003 , J. Flash, An American Savage
- I bent down and with both hands I scooped up as much of this pissshit as I could. The green and brown clump felt like Jello as it dripped down all over my clothes. It was slithering through inbetween my fingers.