GrewSum is a 23 year old hardcore/horrorcore/hip hop rapper from Iowa. His first cd, The Donnie Darkflow EP, came out in 2006. Then he put out Darkflow 2.0 in 2007, was on Mission Infect's Chemical Threats double cd, put out a free cd called The Pheonix on New Year's of '07, then in '08 put out a mixtape called IA Boyz Vol. 1 on April 1st 2008 with the rapper Bubbz. Then he put out A Near Life Experience in the summer of '08.
GrewSum has worked with many artists like BG Bulletwound, Claas, C-Mob, 3rd Degree, Lo Key, McNastee, Shy One, Kutt Calhoun, etc etc. He was on a label called 70 Mile back in '06-'07 but now he has his own label, PRONE Records. He is also in a rap group called the Trailor Park Boyz. Now that you know who he is, fuck off and listen to his music. Buy a cd or something.