Following is excerpt from Frank Herbert's Dune:
You have no idea how much wealth is involved, Feyd," the Baron said. "Not in your wildest imaginings. To begin, we'll have an irrevocable directorship in the CHOAM Company."
Feyd-Rautha nodded. Wealth was the thing. CHOAM was the key to wealth, each noble House dipping from the company's coffers whatever it could under the power of the directorships.
Highlighted is the part I struggle to understand. Looks like something similar to "each noble House taking advantage of the company's money", but I can't find such meaning for the verb "dip". And it seems that use of the verb "dip" with the preposition "from" isn't common too.
Best Answer
In his novel Herbert make a lot of effort to portray water as the single most valuable commodity to the natives of Arrakis. This is significant to the story. Water is held as a communal resource by the Fremen and when a shar of that resource is needed, a portion is dipped from the cistern (collective water storage) to the individual.
To the galactic aristocracy, the most valuable commodity is Spice. The trade in Spice is controlled by the CHOAM company, and the wealth created by that trade is tempting for those in charge to the point that they take some for themselves.
Herbert is making an allusion between the directors of the CHOAM company taking wealth from the trading company and the Fremen taking water from their cisterns. This reinforces how water is considered more valuable than Spice to Fremen, who effectively control the supply of the latter.
"dipping from" is not a normal construct when referring to the fraudulent taking of company funds by directors. It makes sense in this context as a poetic allusion.