having a twisting or snake-like or worm-like motion

A type of shudder at the peak of sex or when the body is completely sensitive.

The act of squirming or flailing around in bed. Most commonly carried out upon awakening, but can last all day if the conditions are appropriate. Keeps at it's best when accompanied by the right music and/or snacks and/or wingman. Best accompanied by all three.

A. The best Ret Paladin on the server of Dethecus in World of Warcraft.
B. Suck Spec Officer of Rest in Pieces

A. The best Ret Paladin on the server of Dethecus in World of Warcraft.
B. Suck Spec Officer of Rest in Pieces

the action performed after experiencing pleasure so great that nothing but convulsions of the body can suffice to express the delight

antonym - writhe in pain

A bitch of a particularly manipulative, destructive or malicious nature, usually with intent.