I think u gotta give it to Reese,it ain't that he invented it...but its the same way you call it the "ace hood flow" when nikkas startin rippin it off like crazy after Hustle Hard came out in disgusting fashion

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But I do remember a few rappers usin that flow when Reese was gainin some momentum,but I definitly don't think it caught on or was as widespread as it was after Karate Chop dropped

...that shyt wuz pretty big,pretty sure Future used it cuz of them GBE nikkas tho we can bet....if sumbody wanted to trademark it tho it would probaly be Pat tho...for this generation I gotta give to Reese...Future took it further
And just if I may add

sumbody mentioned Soulja Boy who did use it before Reese,but he got it off Lil B who is Too Shorts protege,ima just leave this here...the oasis never stops givin

...whether its Function Music/hyphy or Karate chop flow(Future said Freaky Tales was the first song he ever memorized)...the gawds presence is felt