Kendrick Lamar's unreleased collaboration with Lady Gaga, titled "Partynauseous," has finally leaked online.

The pop diva kicks off the track with a catchy hook.

"Nod if you want to be high with the enemy / It's a test of your stamina, do your best," she sang over the piano-led, hand-clapping instrumentals. "Roll it up, baby, smoke it up 'til we're flying."

The Compton emcee then touches on crime and gang violence in his mad city.

"Tell my mama it's bad karma, I just killed a man / Tell your auntie got to pardon me if I hid my hand," he raped. "Me with the nerve and ninety-five marksmen / So I can shoot this game until my trigger finger jam / I see red flag, I see blue flag."

K. Dot also spits about the ongoing problem of racism against blacks in America.

"This is for the early coffins of those discriminated / Or racially profiled, I can look you in the eye," he added.

Stereogum pointed out that the duo's never-released song was originally intended to be featured on Lamar's 2012 album, "good kid, m.A.A.d city." However, it never made the final cut, due to their creative differences.

At the time, the "Applause" singer took to her fan site, Little Monsters, to explain the situation, saying that she "was not willing to compromise musically to the changes his team was making to my music."

"This is why I am not on his record. I have a very specific vision as a producer and songwriter, and I always have," she continued, claiming that the pair's cut would be released "at a different time, for a different project."

"He's a good kid, it's just sometimes a mad city," she added.

Instead, Gaga reportedly repurposed portions of the track as an interlude for her "ArtPop" tour last year.