Phrasal verbs, also called two-word verbs, are idiomatic expressions wherein the second element of the verb (the adverb or particle) is not necessarily predictable.
Phrasal Verb:
soak something up
Meaning / Example:
1. to gather up moisture or a liquid, using an absorbent cloth, paper, etc. > Alice soaked the spill up with a sponge.
2. [for cloth, paper, or other absorbent material] to absorb moisture or a liquid. > Please get some paper towels to soak the spill up.
3. to learn or absorb some information; to learn much information. > I can't soak information up as fast as I used to be able to. > The tourists will soak up anything you tell them.