*Antediluvian: very old, old fashioned, or out of date; antiquated.
“My parents are so antediluvian.” Marge rolled her eyes as she tried to explain to her friends why she couldn’t host the slumber party.
“The word antediluvian is antediluvian, not that i even know what that word means.” Her bff Casey responded.
“It means old fashioned. My parents are so old fashioned.”
“That’s not a good enough reason.” Chimed Lacey.