be the last word
be the last word in (something)
To be the most modern or advanced version of something. Yes, our building is undergoing renovations at the moment, but we have all the latest technology. I can assure you that this machine here is the last word in brain scans.
be the last wordbe the most fashionable or up-to-date.
1989 Life Thanks to a built-in microchip, Teddy Ruxpin became the last word in talking dolls.