PER CURIAM.
Appellants are challenging an order granting appellee's motion to dismiss with prejudice, nunc pro tunc. Appellants argue that the appellee is estopped from asserting a statute of limitations defense. This estoppel argument, however, was never presented to the lower court. This court has no authority to apply an equitable defense, such as estoppel, in the first instance. See, Palmer v. Thomas, 284 So.2d 709 (Fla. 1st DCA 1973) (the function of an appellate court is to review errors allegedly committed by trial courts and not to entertain for the first time on appeal defenses which the complaining party could and should have but did not interpose and present to the trial court for decision). Because it was not raised below, we cannot find the lower court erred in not applying this equitable defense. See, Mighty Oak, Inc. v. Hartford Accident Indemnity Co., 399 So.2d 425 (Fla. 5th DCA 1981). Having no basis to overturn the lower court's order, it is AFFIRMED.
BOOTH, JOANOS and VAN NORTWICK, JJ., concur.