After teasing Roman numerals IV on his Instagram earlier today, Kendrick Lamar has released a brand new single called "The Heart Part 4." Cop it on iTunes now.

On the song, which features multiple beat switches, Cornrow Kenny seems to be going at a certain rapper: "My fans can't wait for me to son your punk ass and crush your whole lil shit/I'll Big Pun your punk ass, you a scared lil bitch/Tip-toeing around my name, nigga ya lame/And when I get at you, homie, don't you tell me you was just playin."

He goes on to say, "Y'all got til April the 7th to get your shit together," hinting at the fact that his next album will drop April 7.

Axl Folie, The Alchemist, Syk Sense and DJ Dahi all contributed to production on the track.

Many people think he's going at Big Sean with those lines above, while others think they're actually directed at Drake. We'll have to see if there's any fallout. See what people on Twitter are saying about the track below.

Twitter Thinks Kendrick Lamar Is Dissing Big Sean on “The Heart Part 4″

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