slither (slithers 3rd person present) (slithering present participle) (slithered past tense & past participle )
1 verb If you slither somewhere, you slide along in an uneven way.
Robert lost his footing and slithered down the bank. V prep/adv
2 verb If an animal such as a snake slithers, it moves along in a curving way.
The snake slithered into the water. V prep/adv