The magic of money
In Omaha poker, a hand is considered double suited when there are two poker cards of one suit in the hand and two cards of another suit (for instance, two diamonds and two clubs). Being double suited in omaha poker is essentially a double odds that you will make a flush in the hand, and therefore is considered much more valuable than unsuited or single-suited Omaha hands (ie: if there are four diamonds on the board and you have one diamond in your hand, in omaha you still don’t have the flush, which is a classic newbie mistake.)
Though the value of a flush in Omaha is less than it might be in Hold em, it is still a hand that can make the nut, and is required for flush draws (as you must use two of the hole cards, it is impossible to make a flush without being suited).
In verbal descriptions of poker hands, the term double-suited is often abbreviated as ‘ds,’ so that the hand would read AA89 ds.
Some Omaha players won’t play not paired hands that aren’t double suited, while other players love just any combination of connecting cards. Either way, the addition of a double suited hand is a lucrative criteria for hands that one might be considering entering a pot with.