。
She was soaking wet from head to toe.
Literal
She [topic-は] whole-body soaking-wet was.
全身 (ぜんしん) means 'the whole body' and ずぶ濡れ (ずぶぬれ) means 'soaking wet.' The prefix ずぶ is an intensifier related to the mimetic ずぶずぶ (sinking deeply, soaking through), and 濡れ comes from 濡れる (to get wet). Together they create a vivid, emphatic image of being completely drenched — far stronger than just 濡れている ('is wet').