Anpazhakan Raghavan (42) and his girlfriend Magesh Eyamalai (28) were drunk after a night out in city's riverside clubbing street of Boat Quay on November 13, 2010.
But Raghavan was berated by the woman's then 40-year-old husband Ramachandran Sitarencan. The husband and wife were then going through a divorce proceeding.
Fight broke out between the two men with Raghavan biting and ripping off part of Sitarencan's left ear.
The court also ruled that Raghavan would not be eligible for early release.