*Folks are already calling August 12, 2013 – the day hip hop boldly returned to its roots.

Monday night saw the release of Big Sean’s single “Control,” a leftover track originally recorded for his upcoming album “Hall of Fame.” But the headlines on Tuesday focused on a verse of the song delivered by guest rapper Kendrick Lamar that fires warning shots against his rap peers…including Big Sean.

“I’m usually homeboys with the same n—-s i’m rhymin with/ But this is hip-hop and them n—-s should know what time it is/ And that goes for Jermaine Cole, Big K.R.I.T., Wale/ Pusha T, Meek Mill, A$AP Rocky, Drake/ Big Sean, Jay Electron’, Tyler, Mac Miller/ I got love for you all but I’m tryna murder you n—-s/ Tryna make sure your core fans never heard of you n—-s/ They don’t wanna hear not one more noun or verb from you n—as,” K-Dot rapped with an extra grit to his already gravelly voice. [BTW, Jay Electronica is also features on “Control.”]

Big Sean told of the track: “Of course Kendrick spazzed on it, of course Jay Elec spazzed on it,” said Sean. “I feel like we all added our own flavors to it. I knew what it was for hip-hop culture. I knew how important it was.”

Rap artists from all over have since been flooding Twitter weighing in with their own reactions since the track debuted on New York DJ Funk Master Flex’s Hot 97 radio show. “I never really tweet about music. But good lord.. @kendricklamar just like.. Bodied everyones entire year’s worth of raps lol,” Just Blaze wrote in awe.

“I hear u loud and clear my n—a… @kendricklamar,” Pusha T tweeted right after the song was released.

Veteran hip-hop producer Pete Rock crowned the performance “illest verse of the year,” while Missy Elliott took to the social networking site to thank the good kid for forcing rap artists “2 be Lyrical and have substance again.”

Bun B also applauded the young MC. “Every rapper is supposed to feel like Kendrick feels as far as wanting to murder n—as on the mic. That’s why I wrote my ‘Murder’ verse,” he wrote referencing his 1996 track with fallen UGK partner Pimp C.

Not everyone was a fan however, in particular Lupe Fiasco. “Y’all know y’all easily impressed. Bar so low you need a shovel to get at it,” he wrote from his private account before he humorously ghost wrote rap responses for MCs like Drake, Jay Z and Rick Ross.

Joe Budden questioned the pride of Big Apple MCs. “A Cali n—a just said he’s the King of NY & u n—as so f—ing worried about your relationships, y’all make me sick,” he messaged. “Where’s old NY !???!”

So who will be the first to lyrically respond to Kendrick’s call-out? Fabolous seems to already be on the case. “Any studios open yet?,” he tweeted early Tuesday morning.

“Control” didn’t make Hall of Fame because of a sample clearance issue, but Sean is trying to make it available on the digital version of the album, due August 27. “We’re trying to work out something where it could at least work digitally. I really fought for that too, man.”

As for reaction to the song, “I haven’t seen a hip-hop song stir up this much excitement in years really,” said Sean. … “I think that name dropping really took it over the top for sure.”