So, I recently took up rapping and I am interested in using the chorus of another artists song for part of mine.
What type of permission do I need for this, or as long as I say somewhere that it isn't me am I good to go?
ISO help please, thanks.

It depends, if you're going to commercially use your song, you need the full copyrights from that artist's label, so I suggest you contact them and ask politely.

If you're just using this for fun and are NEVER going to sell or do ANYTHING with it, it's fine to use it.
Not 100% sure though.