Learn English – What does “of cant origin” mean

T.E.D. has a fine answer, just wanted to say it my way. "Proverbial" means "having to do with a proverb", or as T.E.D. says "as heard in a proverb". There are many well-known proverbs in colloquial English. For example, there is one, "people in glass houses shouldn't throw stones", meaning that people in a precarious moral position shouldn't point out the failings of others. English proverbs are generally allegorical, similar to a biblical parable (and some parables, such as the parable of the mustard seed, and other biblical stories like David and Goliath, have remained popular in English even as the culture trends toward the secular). Some are poetic, such as "beer before liquor, never been sicker" (meaning if you start out an evening drinking beer, then progress to hard liquor, you'll have a bad hangover in the morning), and contrary to the connotation of the word "proverb" as imparting ancient wisdom, proverbs are invented all the time ("loose lips sink ships" was coined in World War II, in the months leading up to the D-Day invasion; it was such a big operation with so much of the military and industry involved that the U.S. Government basically asked the entire country to keep whatever they knew or suspected about it secret).

So, a person who talks about "the proverbial man in a glass house" is referring to the proverb in my first example. Where the proverb is known, its imagery can be evoked without recounting it fully.

"Proverbial" can also be used as a synonym for "idiomatic", having a similar meaning but relating instead to idioms. Idioms are popular, somewhat metaphoric sayings regarding common situations; for example:

• Up a creek without a paddle (in trouble with no way of helping yourself)
• Out on a limb (at serious risk for injury to body, reputation, or pride)
• Getting up on the wrong side of the bed (starting the day in a bad mood)
• Getting cold feet (becoming nervous about something one is about to do)
• The pot calling the kettle black (calling someone else out for a flaw you obviously possess yourself)

These sayings can also be referred to "proverbially", even though they're idioms; you may hear of being "up the proverbial creek", which is simply an alternate way of saying "up a creek without a paddle" as the original term has become slightly cliche.

AFAIK, "sex sells" mostly refers to promotional advertising. The origin goes back to as far as 1870s when a tobacco company used sexual entendres on package cover.

One of the most egregious examples was the National Airlines “Fly Me” campaign, featuring stewardesses saying, “I’m Cheryl... Fly me.” National passengers increased by 23 percent, twice that of any other airline.

Interestingly, there is evidence of this in newscasts as well. Regarding news broadcasting:“There are two sayings that are familiar in every news room across the country: 1) sex sells; 2) if it bleeds it leads.” The first is obvious, as is the second: if it's a tragedy, a terrible accident, etc., it's on the top of the newscast.

Before the actual slogan came out, though, sex sold. When one thinks of the 3rd c. work, the Kama Sutra, how many people think of its philosophies on family life and other advice on living a good life?