Nemesis

[Sarah]

The goddess of retribution or vengeance; hence, retributivejustice personified; divine vengeance.This is that ancient doctrine of nemesis who keeps watch in theuniverse, and lets no offense go unchastised. Emerson.

[Sarah]

A righteous infliction of retribution manifested by an appropriate agent.
Your worst enemy.

[Sarah]

NEMESIS was the goddess of indignation and retribution for evil deeds or undeserved good fortune. She was a personification of the resentment aroused in men, -and in the gods-, by other men who commited crimes with apparent impunity, or who had inordinate good fortune. Her name means 'she who distributes or deals out'.
Nemesis directed human affairs in such a way as to maintain equilibrium. Happiness and unhappiness were measured out by her, care being taken that happiness was not too frequent or too excessive. If this happened, Nemesis could bring about losses and suffering. As one who checked extravagant favours by Tykhe (Fortune), Nemesis was regarded as an avenging or punishing divinity.

[Sarah]

A biological weapon sent by the Umbrella Corporation to kill all STARS members. Extremely difficult to destroy, since it is both leathal and physically hardy. If you encounter this bastard, run... Run.... RUNNNNNNNNNN!

[Sarah]

It's a [righteous] infliction of retribution manisfested by an appropriate agent personified in this case as an 'orrible cunt, ME!

[Sarah]

a pro evolution soccer player who always pops up and gets the winner against you.

[Sarah]

Character in 2000AD. Part of an organisation called Credo dedicated to overthrowing the human Termight empire.
Initially, he was pretty cool. Then it all got a bit silly.

[Sarah]

One of the best roller coasters in the world, found at Alton Towers, Staffs, UK. Although only relatively short, the full on intensity during every second of the ride makes it outclass many bigger coasters.

[Tina]

Someones nemesis is a person or thing that is very difficult for them to defeat.