A new word, usage, or expression, 2: (psychology) a new word that is coined especially by a person affected with schizophrenia and is meaningless except to the coiner
The English language is constantly picking up neologisms. In recent decades, for example, computer technology has added a number of new terms to the language. Webinar, malware, netroots, and blogosphere are just a few examples of modern-day neologisms that have been integrated into American English.
The word neologism was itself a brand-new coinage in the latter half of the 18th century, when English speakers borrowed the French term néologisme. The word's roots are quite old, ultimately tracing back to ancient Greek neos, meaning "new," and logos, meaning "word."
Shameless boldness: insolence
To the Romans, the shameless were "without forehead," at least figuratively. Effrontery derives from Latin effrons, a word that combines the prefix ex- (meaning "out" or "without") and frons (meaning "forehead" or "brow"). The Romans never used effrons literally to mean "without forehead," and theorists aren't in full agreement about the connection between the modern meaning of effrontery and the literal senses of its roots. Some explain that frons can also refer to the capacity for blushing, so a person without frons would be "unblushing" or "shameless." Others theorize that since the Romans believed that the brow was the seat of a person's modesty, being without a brow meant being "immodest" or, again, "shameless."