OG Maco & Yung Simmie #ProjectLaing

Hit artist with the single "Bitch You Guessed It".

OG Maco, the 22-year-old screamo-rap firebrand, bursts into Atlanta's Quality Control studios exactly how you'd hope, a bare-chested, heavily tattooed whoosh of energy, offering a huge high-five to fellow QC signee Skippa Da Flippa.

"Let me put my shirt on, so you know I'm in professional [mode]," he says.

He pops on a black shirt, but he is probably more recognizable shirtless. In his video for "U Guessed It," Maco plays the kinetic, spasmodic ringleader of an a impromptu moshpit held in a hotel elevator. The clip is currently at more than 10 million YouTube views, the single is riding up and down the lower reaches of the Hot 100 and Vine has made it a go-to anthem for six-second parodies (his favorite is "Hump Day Camel").n a blippy beat and a vocal performance that builds from a mumble to shout, the verse rage-stumbling into the chorus, was inspired by an angry night returning from a night drinking at Hooters.

"I was actually talking to them about how my engineer was lazy as shit," says Maco. "I was sitting there like, 'Man, I bet this nigga ain't done no beats.' We got back in the house and sure enough. . .So I slap him in the back of the head. I went upstairs and I tried to sit and not do nothin'; but I was just so mad I was like, 'Fuck it!'"

Maco says that, at about 1 a.m., he got up, went back downstairs, slapped his engineer on the head again, grabbed the headphones and told him to press record. He angrily freestyled over the minimal, barely-there piano-creep, inventing lyrics as he heard the beat for the very first time.

"I didn't even hear the song for real for real until the next day. I was drunk as shit. I woke up like, 'Oh, I did something last night, huh?'"