If your full house was the best high hand, you didn't lose. What happened was that you only won half the pot. When there is a qualifying low hand - the usual requirement is no card higher than an 8 - the best high hand and the best low hand split the pot.
Another possibility is that you assumed you had a full house but really didn't. People sometimes get this wrong when they haven't played much Omaha because they don't remember that you must use exactly two hole cards. So, as one of many possible examples, if you have AAA8 in the hole and the board is Q 9 5 2 2, you have two pair (AA22Q), not a full house because you're not allowed to use your third A. |