The term 'Catch A Body' is sometime used metaphorically, for example, Cassidy had a diss song aimed at Meek Mill which was titled "Catch A Body (Meek Mill Diss)," the title of this song means that Cassidy is going to lyrically kill Meek Mill.
In Nas' "NY State Of Mind", Nas said ""N*ggaz be runnin through the block shootin
Time to start the revolution, catch a body head for Houston..." Nas is basically saying he's gonna start a revolution by killing one of the individuals shooting on his block, and then heading to a safe haven until things quiet down.
In Drake's "Headlines" song, Drake said "You know good and well that you don't want a problem like that - You gonna make someone around me catch a body like that." Drake is basically saying if you don't want to mess with him, if you do, someone around him is going to kill you. This is a perfect example of someone talking about catching bodies but ain't about that life, it's very unlikely that Drake even hang around people that are about that life.