"Believe Me" is probably the biggest song outside of "Chiraq" right now, but it somehow has garnered the same attention in terms of freestyles.
Slim Thug, who's been doing his share of freestyles lately has decided to go in on the track, probably partially because he gets name dropped by Drizzy on the original (something he calls attention to by looping a sample of the line as a sort of hook to the remix).
Of course Drake is calling attention to Slim Thug's flow, which works very effectively over the pensively dark instrumental. With the rapper once again making the best use of his naturally chopped and screwed voice.
Slim Thug flow, talk slow so you hear me
Underground boss, other rappers ain't near me
Made it my career, y'all still said gimme
Did it my way, still ain't changed clearly