Peter says he bore our sins in his flesh. Peter draws this idea from Isaiah 53:4 "Surely our griefs He Himself bore, And our sorrows He carried; Yet we ourselves esteemed Him stricken, Smitten of God, and afflicted."
Figurative language. Do you think sin is something that can be transferred to another person. That would make it either a substance or a spirit. The former makes no sense to me, and the latter touches on blasphemy IMO to say that Christ became satan (who is sin).