Third-person singular simple present indicative form of rack one's brain

any disorder of mental function due to physiologic (organic) causes rather than mental causes

plural of organic brain syndrome

An addiction to anger and outrage brought about by overconsumption of sensationalist media.

(idiomatic) To beat someone very severely.

(medicine) A congenital muscular dystrophy associated with severe myopia or glaucoma and mental retardation or hydrocephalus

(idiomatic) One's own idea or conception.

(slang) To shoot in the head.

(informal) Extremely bored.

(idiomatic, vulgar) To sexually penetrate (or be penetrated) in a voracious but pleasurable manner.