knotted wrack

Fucus vesiculosus, seaweed widespread in the cool waters of the Atlantic and Pacific. / Nereocystis luetkeana, kelp common on the northeastern Pacific coast.

(idiomatic) Complete destruction.

Destroyed by a storm. / Stormy, beset by a storm.

Alternative form of nerve rack

Alternative form of nerve rack

Alternative form of nerve-racked

A line of seaweed deposited on a beach at high tide

plural of wrack line

Eggcorn of rack one's brains.