Definitions or common life experiences that there should be a word for

Ever come across a scenario in life so often you wish you had a word to coin it? This is the list for you!

Definitions or common life experiences that there should be a word or neologism for :
 * An adjective for "uncomfortably or awkwardly sincere," or in colloquial terms, "too real."
 * A noun for a person who is "uncomfortably or awkwardly sincere," or in colloquial terms, "too real."
 * An term for some cultural product that is "so bad, it's good," (to use John Waters' words) i.e. tastefully distasteful, where the low-brow meets the high-brow sophistication of taste. Reveling in the reception of entertainment from trash, and fully ackowledging this. "Campy" or "kitschy" come close.
 * A noun or verb for a specific state of rumination in which you relive in your head a past argument or discussion, and regret that you didn't think of the right words to say until just now: the "Aw man! I totally should have said that!" phenomenon.
 * A non-gender-specific pronoun for a person besides "him/her," or "(s)he."
 * A conjunction for "and/or."
 * An adjective for the smell of burning leaves in autumn (a common practice in the midwest, redolent with remiscent memories, see Alinea for an example).
 * A word for a smell that elicits a memory (see this project as a collection of smells that elicit memories).
 * A word for that dropping sensation in your stomach when you realize something bad, like you forgot you had to take a test today, or you're late for an appointment, or perhaps something more existential, like "what the hell am I doing with my life." A sort of revelation or moment of insight, but an unpleasant one. Similar in Greek tragedy to Anagnorisis, but perhaps a modern equivalent.
 * A word for those humbling experiences when you discover you're way off on something you naturally assumed since you've known about it. E.g., some common ones: you thought beeline was spelt "b-line" or you thought the term prima donna was spelt "pre-madonna." In the radio show This American Life, the host coined this term "modern jackass."
 * A type of tip of the tongue sensation when you forget what you were going to say, and compulsively try to remember it but to no avail.
 * A "circle-merger": when two social circle of friends converge into one large social circle.
 * A term for a friend or former friend from whom you've grown apart, and can only connect with by your shared past.