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Some tropes can be pretty broad. Some can be so broad that even a specific form of them can be tropes by themselves.

Let's say there was a trope for 'Juggling'. You realize that "Scarf Juggling" and "Knife Juggling" are pretty common as well, to the point where you can think of half a dozen examples for both. Those would be {{Sub Trope}}s, while 'Juggling' in general is their SuperTrope. In [[http://en.wikipedia.org/wiki/Genus–differentia_definition logic terms]], "Juggling" is the genus, while the different kinds of juggling are the differentia; they share the same common theme in their definition, but they each have additional features that distinguish one from another.

What makes a sub trope can vary. Perhaps the most common way is that several examples of a trope have a common element not seen in the other examples. That makes them distinct from the larger trope, while still being included. Or, as mentioned above, a trope can have several possible variations built in, and once examples of any of those variations are common enough, they form a sub trope.

Heck, some tropes can be sub tropes of more than one super trope. This can be a shared aspect of them or actually [[XMeetsY combining the two tropes]].

Compare SisterTrope.

Compare/Contrast Administrivia/TheSameButMoreSpecific (when a distinction is not enough to make a separate trope).

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!!Notable Sub Tropes

* ChemicalMessiah is a sub trope of TerminallyDependentSociety.
* HeroBall and VillainBall are sub tropes of IdiotBall, just applying to actions typical of those characters.
* MarySue has enough variations that it's split into several types.
* OurMonstersAreDifferent shows that fantasy writers often use various and different rules to portray some of the most popular mythical creatures. Each subtrope deals with the most common rules that appear in works involving [[OurDragonsAreDifferent dragons]], [[OurVampiresAreDifferent vampires]] (actually, vampires get [[YourVampiresSuck two]]), [[OurWerewolvesAreDifferent werewolves]], [[OurGhostsAreDifferent ghosts]]...
* ParentalAbandonment refers to the common device of parents who are missing or dead. Some subtropes are MissingMom and DisappearedDad, when only one parent is unavailable.
* WhatMeasureIsANonCute points out the recurring protrayal of cute animals as the good guys and non-cute animals as the bad guys. ReptilesAreAbhorrent is a subtrope of this, as it points out that reptiles are almost always protrayed as evil and vicious.
* DeusExMachina is a sub trope of AssPull, where the pull is used to resolve the conflict.
* ImpossiblyCoolClothes is like a ImpracticallyFancyOutfit, but almost strictly done in drawn media, because that kind outfit can barely even be worn at all in real life.
* FanHater is a sub trope of {{Hatedom}}, in that they hate both the work and the fans of that work. If they hate just the work, it's the latter trope.
* TooIncompetentToOperateABlanket is a variation of StrawmanProduct, in that the strawman aspect is making a product look far harder to use than it actually is.
* HeroicResolve is a sub trope of both HeroicSpirit and UnstoppableRage.
* PrincessClassic is a form of EverythingsBetterWithPrincesses, but about a specific archetype of them.
* HypnotizeThePrincess is literally the DistressedDamsel being [[{{Brainwashed}} Hypnotized]].
* BigBulkyBomb is StuffBlowingUp, but that the explosive device be really big (regardless of the actual explosion).
* CanisMajor and MegaNeko are BiggerIsBetter applied to canines and felines respectively.
* SomethingElseAlsoRises is a form of DoesThisRemindYouOfAnything, where the "anything" is... male... "excitement".
* AliceAllusion is a basically a ShoutOut to ''Literature/AliceInWonderland''

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