rancor

n. hatred, animosity, enmity; bitterness, resentment, ill will

The rancor is a 5 meter (16.4 foot)-tall carnivore present in the fictional Star Wars universe. In Return of the Jedi, the crime lord Jabba the Hutt had a pet rancor below his pad to get rid of unwanted or displeasing guests. Victims, such as the slave girl Oola, were dropped through a trap door into the pit below and eaten by the rancor for the amusement of Jabba and his guests.When Luke Skywalker tried to free Han Solo, Jabba dropped the Jedi into the pit. A Gamorrean guard named Jubnuk pranced into the pit along with Luke. Jubnuk panicked and tried to get back up out of the pit, only to be laughed at by those above; Jubnuk was promptly ripped to shreds. Luke managed to kill the rancor by dropping a heavy metal portcullis down onto the monster's neck. While Jabba was enraged by the rancor's death, its human keeper, Malakili, wept over the death of his charge.
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n. gall, grudge; malice, spite; rancor

(n.)
The deepest malignity or spite; deep-seated enmity or malice; inveterate hatred.
  

Noun
1. a feeling of deep and bitter anger and ill-will
(synonym) resentment, bitterness, gall, rancour
(hypernym) hostility, enmity, ill will
(hyponym) heartburning