Antediluvian

An interesting and humorous metaphorical description of something (for example a product or service or concept) that is obsolete, old-fashioned or primitive, or devised a long time ago. ‘Ante’ is Latin for ‘before’, and ‘diluvian’ is from Latin ‘diluvium’ meaning ‘deluge’, so the overall literal meaning is ‘before the flood’, being the biblical flood and Noah’s Ark, etc. Antediluvian is therefore a clever way to say that something is (so old as to be) ‘out of the Ark’.