Jahkari Jack, a.k.a Jakk Da Rhymer, is an American rapper based out of Philadelphia, PA. He is a member and co-founder of the Philadelphia rap collective Dark Chip Syndicate. He was also one of the early members of the New York rap collective Pro Era, being closely associated with founding member Courtney “Jamal” Dewar, a.k.a. Capital STEEZ, and the 47 subgroup within Pro Era (including Capital STEEZ, Dirty Sanchez, Jab47, and Rokamouth).

Long before Pro Era was formed, in the fourth grade, Jahkari and Courtney founded a rap duo called Saturday Morning Breakfast. Jahkari went by Excalibur while Courtney went by Blowtorch. Later on, Jahkari and Courtney—who had changed their names to BlakkJakk and JaY STeeZ, respectively—rebranded their duo as The 3rd Kind, and released one mixtape in 2010 titled The Yellow Tape. Shortly after the tape’s release, the duo disbanded, and they once again changed their names to Jakk The Rhymer and Capital STEEZ.

In 2011, Capital STEEZ co-founded Pro Era, and Jakk soon became associated with PE. Jakk appeared on the “Reloaded” version of Capital STEEZ’s first and only solo mixtape, AmeriKKKan Korruption, in 2012. After the death of Capital STEEZ the same year, Jakk appeared on only a few more Pro Era tracks before seemingly distancing himself from the collective.

Jakk Da Rhymer co-founded Dark Chip Syndicate around early 2016. They released one album together before disbanding in 2020. He released multiple solo efforts around this time.