DDG landed Blueface 's first post-prison interview on his live stream, and the "Thotiana" rapper apparently has a new lease on life ... no smoking or drinking, but YES to a Jake Paul fight!!!

Blueface was released this week after serving 21 months and relays to DDG that his noticeable chunkier appearance from his prison photos was actually intentional -- he binged on mashed potatoes and oatmeal with his own commissary money until he barfed!!!

Blueface says he had fights and fades to give out, and the extra weight helped him deliver KOs -- and not the other way around!!! Gallery Launch Gallery Getty

DDG asks Blueface is open to professionally hopping in the ring again, and BF immediately calls out the No. 1 challenger on the exhibition circuit -- Jake Paul!!!

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