Timmy cheats at Tic-Tac-Toe.
Timmy throws like a girl.
Timmy hates little kids, dogs and old people.
Timmy cries during Lassie.
Timmy eats yellow snow.
Timmy cries over spilled milk.
Timmy prefers the metric system.
Timmy breastfed until he was 13.
Timmy likes interpretive dance.
Timmy rarely bathes.
Timmy is a vegetarian.
Timmy is worried about the "military-industrial" complex.
Timmy can't wait for the dawning of the age of Aquarius.
Timmy thinks hard work is for suckers.
Timmy can't tell time.
Timmy thinks Errol Flynn is dreamy.
Timmy buys things not made in the USA.
Timmy pees sitting down.
Timmy breathes through his mouth.
Timmy wants to live in the south of France.
Timmy has never heard of Google.
Timmy calls hot dogs frankfurters.
Timmy eats tofu.
Timmy needs to diet.
Timmy practices making out with his hand.
Timmy has a pet turtle named Shelly.
Timmy wets the bed.
Timmy is too scared to watch the Wizard Of Oz.
Timmy talks to his mom on the phone 3 hou...
Timmy watches the radio and listens to TV.
Timmy never brushes his teeth.
Timmy uses medicated deodorant.
Timmy fears commitment.
Timmy gives himself dutch ovens.
Timmy drinks paint thinner.
Timmy goes to be at 7:30.
Timmy stole the Lindbergh baby.
Timmy is a COMMUNIST!

The phrase "long tail" has a couple of related, but different meanings - both from the shape of a graph of sales (or popularity) on the Y-axis.

In this case, the X-axis is a listing of different titles, sorted by popularity. There are a small number of extremely popular items, tailing off to huge numbers of less popular items.

In the other use, the X-axis is time. Something can be hugely popular for a few days/weeks/months, but will continue to have greatly diminished sales for many years to come.

The concept of the "long tail" is that the combined popularity or profitability of the items in the tail can be a significant part of the overall profitability of the entire market, particularly when internet sized economies of scale make it efficient to stock and sell these items.