A fussion of brother and incest it's a genre of fanfiction that involves two brothers in a sexual and/or romantic relationship. Although a subgenre of slash fiction because it's about a male/male couple, it's not widely accepted in slash fandom
One of the most well-known brothercest pairings is Sam and Dean Winchester from the tv show "Supernatural", AKA Wincest. Other common example is Petrellicest, involving the brothers from tv show "Heroes", Nathan and Peter Petrelli.
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.