(1):
(v. t.) To move with short, quick contortions; to move by twisting and squirming; like a worm.
(2):
(n.) Act of wriggling; a short or quick writhing motion or contortion.
(3):
(v. i.) To move the body to and fro with short, writhing motions, like a worm; to squirm; to twist uneasily or quickly about.
(4):
(a.) Wriggling; frisky; pliant; flexible.