Junkie
Part of speech: noun
Definition: A narcotics addict, especially referring to heroin users. An enthusiast of something.
Nut
Part of speech: noun
Definition: A hard-shelled seed.A fastener: a piece of metal, usually square or hexagonal in shape, with a hole through it having machined internal threads, intended to be screwed onto a bolt or other threaded shaft.A crazy person.The head.A testicle.The amount of money necessary to set up some venture; set-up costs.A stash of money owned by an extremely rich investor, sufficient to sustain a high level of consumption if all other money is lost.On string instruments such as guitars and violins, the small piece at the peghead end of the fingerboard that holds the strings at the proper spacing and, in most cases, the proper height.En, a unit of measurement equal to half of the height of the type in use.An extreme enthusiast, such as a gun nut or car nut.
Part of speech: verb
Definition: To hit deliberately with the head; to headbutt.To ejaculate (semen).
Example sentence: My point is that perceptual bias can affect nut jobs and scientists alike. If we hold too rigidly to what we think we know, we ignore or avoid evidence of anything that might change our mind.