Remember Zack Morris from Saved by the Bell and his big ass cell phone? Well, anyone with an old ass phone that is lacking todays features has a Zack Morris Phone

an early mobile phone known mainly for for it's bulky size(from a character in the sitcoms Good Morning and Saved By the Bell, known for using this type of phone)

Refers to the Motorola Dynatac 8000X cellular phone. The enormous, gray, brick-sized phone was popularized by the character Zack Morris in Saved by the Bell. This was the first cellular phone to receive FCC acceptance in 1983. DYNATAC is an acronym for "Dynamic Adaptive Total Area Coverage."

One of those 8 pound cell phones that resembles a brick. These devices were primarily made by Motorola in the mid to late 1980's. Zack Morris (a.k.a. Mark-Paul Gosselaar) regularly used these giant "portable" phones on the popular syndicated show, "Saved By The Bell."

To be talking on a larger than normal cell phone, as Zack hauled around his cool "Cellular phone" during Saved By The Bell

a phone that folds up to save space and protect the buttons from being pressed by moving around in the pocket

A Zackberry is really old, big, brick like Black Berry. It is in reference to the 'Zack Morris Phone'.