Seems to have been taken from Caribbean English, in which it is (was) used to refer to a gullible person. The word has since undergone several changes in meaning, so that it now depends on which sense of the word the speaker has been exposed to. It was popularized in Scorsese's "Mean Streets" (1972), but when Johnny calls Jimmy a mook, it causes confusion: "Nobody knows what a mook is" even appears in the script.

a humorous term for a blow job.

derogatory term to describe an undesirable individual.

A generic derogatory term. Many attempts have been made to define it, but it's used too widely to pin it down.

A term coined by Douglas Rushkoff in an episode of PBS's "Frontline" entitled "The Merchants of Cool." Mooks are archetypal young males(teens-early 20s) who act like moronic boneheads. They are self centered simpletons who live a drunken frat-boy lifestyle(or are frat-boys). Examples can be found anytime someone watches "Jackass." Rushkoff claimed that the media glorifies this ideal and stifles natural self expression, however, some people might argue teenage boys have always acted like morons(its actually a long-standing stereotype). Nonetheless, standardized conformist dumbass-culture behind a veneer of exhuberance is a scary notion indeed.

Opposite of Mooks are Midriffs; oxymoronic innocent skanks who are modeled after Britney Spears.

The term is a derivative of "narb" which stands for a "No Apparent Reason Boner". A narby is typically one who is acting like a mook or turbo; a douchebag.

A superseded form of media while is still used by a small percentage of older hip hop fans 'because it sounds more raw'

The media which gave birth to the term 'mix tape'