A club bouncer was rushed to hospital with a knife blade embedded in his stomach after being stabbed by a drunken patron, NSW police say.

The Central Coast security guard was helping remove the 41-year-old intoxicated man from the premises on Wilson Road, Terrigal at the time of the attack, on Saturday evening.

The 53-year-old was rushed to hospital for emergency surgery after the knife blade broke off inside his stomach.

Police say the drunken man suffered facial cuts after becoming involved in another altercation with two unknown men, and is under guard in hospital.

They say they expect to charge him on his release.

The blade has been removed from the guard's stomach and he is in a stable condition.