Jumping the Shark is when fans look back over a series that has suffered a decline in quality and identify the turning point where things started to go downhill.
Ruined FOREVER is when the latest installment of a series is released and the fans are so unhappy with some element that they issue a knee-jerk declaration that it's a shark jump before anyone can tell if the series is going downhill for sure.
Kick the Dog is when an action reminds us who the villain is, and is otherwise pointless: evil for evil's sake.
Poke the Poodle is kicking that's nowhere near extreme enough, so that the villain fails at seeming evil.
The Moral Event Horizon may be crossed by an action that is or is not a Dog Kick; instead, it is about the sheer moral depravity of the act, to the point that the audience now wants the character who crossed it dead.
Kid With The Remote Control is a person who has complete control over a powerful, and often entirely neutral, entity that only obeys their commands.
Kid with the Leash is when the powerful entity is actively malevolent or at least highly destructive when left to its own devices. The kid in this case is not only responsible for directing it but actively keeping it from wreaking havoc.
A Kuudere is a character, usually female, that comes off as unemotional at first, often with some elements of The Spock, yet has a sweet, cute, and nurturing side that is there all along but that she rarely shows.
A Tin Manclaims to have no emotions, yet their actions directly contradict this. It is clear to the audience that the character was ruled by their emotions all along. Has a much higher chance of being male than the Kuudere.
A Mary Sue Classic is the archetypal Sue character, mainly characterized by perfection in everything and excessive adoration or admiration from other characters. It's especially associated with the Purity Sue type.
A Mary Suetopia is a country where life for its citizens is so perfect that it reaches Sue-level credibility stretching.
Portal to the Past: There is a permanent portal linking two different times together. Most likely, one hour on one side of the portal equals one hour on the other side, but dilations are possible.
San Dimas Time: The characters behave as if spending an hour in another time means that they will have to return to the point in time that is one hour after when they left. This is not explained or reflected upon, and is probably false.
Meanwhile, in the Future: The narrator treats two different plot threads in different times as if they were happening simultaneously, despite the fact that the plot thread in the past is going to be resolved long before the thread in the future starts (using chronological time).
A Morality Chain is someone special to the Blood Knight whose strict moral creed is the only thing keeping them from slaughtering everybody.
A Morality Pet is someone special to a Jerk Ass or Blood Knight who presents the opportunity to show some leeway towards heroism or at least peaceful co-existence with heroes and neutrals (and the audience may like the character more).
Mundane Wish is when a character is given a limited number of wishes, and the wisher deliberately chooses something mundane or simple of his own free will. This may occur because the wisher is an honest person who doesn't want or need anything grandiose, or he is Genre Savvy enough to counteract the backfire potential of a literal or Jerkass Genie.
Wasteful Wishing is when a character is given a limited number of wishes, but wastes them on something completely frivolous or silly even though he'd prefer something more grandiose. This usually occurs because the person making the wish was goofing around or panicked.
An ‹bermensch is someone who has discarded conventional moral and social restraints and often seeks to elevate himself over humanity or make a better world. Nietzsche's actual philosophy.
A Nietzsche Wannabe is someone who takes "life is meaningless" to its ultimate extreme, becoming nihilistic and/or hedonistic and often engaging in wanton destruction to prove his point. The Theme Park Version of Nietzsche's philosophy.
Not in My Contract is a character refusing to do some task that falls outside his statedjob description. It is usually an expression of simple laziness or a ploy to demand additional compensation.
Not What I Signed On For is a character raising an objection after learning that the job or situation is not as originally advertised. It is often motivated by ethical qualms about the newly revealed real mission.
Only Idiots May Pass is where the game requires the player to perform an erroneous or unnecessary action despite a better option that should be available, usually because the player isn't expected to use the better option yet.
Stupidity Is the Only Option is where the game requires the player to perform a visibly stupid, immoral or illogical action, and then punishes the player for doing it.
Violation of Common Sense is where the game requires the player to perform a visibly stupid, immoral or illogical action, and then rewards the player for doing it.
A Palette Swap is when a new character in a video game is created by simply changing the color palette of an existing character.
Underground Monkeys are new characters that expand a character type or family by making slight changes to a base character's stats and/or appearance, usually noted by adding something descriptive to the existing character's name.
Parenthetical Swearing is when a character says a phrase that, taken out of context and without inflection, would come off as a completely ordinary, sensible, and inoffensive statement; however, its context and inflection makes it sound like the speaker is swearing. The speaker will almost always be angry or upset.
Unusual Euphemism is when a character says a word or phrase that is meant to replace a swear or "adult" topic, which often makes no sense in context. The speaker need not be angry or upset for an Unusual Euphemism.
The Power of Cheese is the people in a commercial doing stupid, dangerous or crazy things because the product is just that good.
Too Incompetent to Operate a Blanket is when the ad attempts to convince the audience that they need the product by showing people having severe difficulty doing the task "the old way". The Old Way usually involves something as simple as a colander, a pair of scissors, or a blanket.
Both of these tropes involve the functional destruction of a person's history; the difference lies in the completeness of this event.
A Ret Gone simply erases the character from history. They don't exist, they never existed, and nothing they did ever happened in the first place.
Being Unpersoned involves the destruction or alteration of all records, sometimes up to and including memory alteration, but the person still existed — or perhaps exists — and there may be evidence of this if you're persistent enough.