Cybernetic bleed-back was the translation of strong emotions and impulses from a cybernetic contraption to the wearer.
Cybernetic bleed-back was experienced by Bialar Crais, whose "Hand of Friendship" was a mutual neural interface between the Leviathan Talyn and the receiver. The first type of the "Hand of Friendship" had this large downside. This would have gotten him killed, if John Crichton and Aeryn Sun had not been there to remove the interface. ("Green Eyed Monster")