Onoja, from Ogbadibo in Benue state, had sex with four of the women in succession, but stopped breathing while in bed with the fifth.
Two women were arrested after the incident.
Onoja reportedly returned from a bar around 3am on Tuesday, and headed for the bedroom of his youngest wife.
His five other wives - who held a meeting before their husband arrived home - allegedly burst into the bedroom armed with knives and sticks to insist that the man has sex with them too.
The man reportedly resisted the demands of his wives before being overpowered.
The youngest wife said the five women ran into the forest when they realised their exhausted husband was dead.