In the roster of battle outcomes when fighting foes you can sometime see 'Knot (Oral)' or 'Knot (Anal)' .  What does it mean and how do I achieve it.

It means they have a knot on their dick and if they penetrate you for too long their dick gets lodged in and can't be removed and you lose the encounter.

To answer how you achieve them both, your enemy just needs to have high enough lust and then you can take a kneeling stance for oral or a prone stance for anal.