The Cleveland-born musician didn't hold back, directing his commentary straight at Drake saying, "Say it to [my] face, p***y. You think it's a game. I wanna see you say it to my face. I'll be out soon. Promise."
"Man f**k that n***a," Fiasco posted on Twitter. "What part of 'rehab' is calling people p***ies and asking for fades?! Rehab is checking your own problems not this s**t."
While Fiasco certainly has a point that Cudi should be focusing on himself during this difficult time, his tweet was worded a bit harshly, consequently setting his mentions on fire.
The Chicago emcee then reminded those on Twitter that he knows what it is like to be in Cudi's shoes, with Cudi recently checking himself into a rehab facility to cope with depression and suicidal urges.
"No but when s**t got real & suicidal for me I accepted the compassionate therapy of my true friends," the rapper clarified. "I cherish them to this day..."
Take a look at Lupe Fiasco addressing Kid Cudi's recent remarks in the posts below.
(Photos from left Rob Kim/Getty Images, Roy Rochlin/FilmMagic)