See slither in Webster's New World Roget's A-Z Thesaurus II
verb
To lose one's balance and fall or almost fall:
skid, slide, slip. Idiom: take a skid (or slide). See moveTo move sinuously:
sinuate, snake, undulate. See moveTo move smoothly, continuously, and effortlessly:
glide, glissade, lapse, slide, slip. See move
Learn more about slither