You or your ex-spouse can appeal the part of your divorce decree concerning the six-month waiting period. However, once the court grants the appeal, both of you must still wait at least 30 days before you remarry or cohabit. If you don't appeal your divorce decree or do not wait 30 days after a granted appeal to remarry, the court can find you guilty of bigamy, a felony punishable by imprisonment. If you decide to ignore the law by cohabiting rather than remarrying, the court can find you guilty of adultery, also a felony charge.
One way around the statute completely is to remarry your ex-spouse. The law specifically allows you to remarry, or cohabit with, your former spouse within the six month period. Additionally, If you were divorced in another state and then move to Oklahoma, there are no restrictions on your ability to remarry.
Another way around the Oklahoma statute is to marry outside the state of Oklahoma. It's perfectly legal to leave the state to remarry even if your divorce decree was issued in Oklahoma; however, you can't live together with your new spouse in Oklahoma within the six-month period. Therefore, if you remarry outside Oklahoma, but then return to Oklahoma to live before the six-month period is up, the court can still find you guilty of bigamy, which carries a minimum sentence of one year in prison.
If you marry someone other than your former spouse before your waiting period has passed, your new marriage is subject to annulment at any time. You or your new spouse can petition the court for annulment -- and the court can grant that request even years into the future.