I've been coining terms in my entire life; my parents sometimes say some words I coined when I was 5 in nostalgia, though those words have long been abandoned. Back in middle school and high school, I had a dictionary of terms I invented. Actually my parents are still using a word I coined back in middle school in public, believing that everybody uses that word in my way. Though I'm not making the dictionary any more, neologism is still my thing. Terms I invent are often related to my special interests. Here are some terms I currently use:
eigendish: my favorite dish at a restaurant. I have several other words with the prefix eigen-, meaning characteristic, named after eigenvalues and eigenvectors in linear algebra. For instance, eigenexpression (sentences I say over and over again), eigenspot (I like to sit in the same spot in restaurants, and that spot is called "eigenspot"), and eigenstyle (my dressing style).
high throughput food serving: several people serving food at the same time to make the line move faster, named after high throughput sequencing in genomics
setwd: go to my office, named after the function used to set working directory in the R programming language
working directory: my desk, at home or in my office
little trip: bicycle road trip; I coined this term when cycling was my special interest (2014) as bike road trips typically take less than a day
travelome: all my past travels, just like the -ome suffix in genome and transcriptome.
ideological linkage disequilibrium: when ideas that are not logically related tend to appear together in beliefs, named after linkage disequilibrium in genetics.
alpha and beta: mainly used when complaining that my parents care too much. I would say, "You care about alpha and beta." I coined this term back in high school, when my math teacher used lots of greek letters to teach trigonometry. I had more related terms at that time, for instance, "lambda" meant "no" (and I named people around me after greek letters). My name Lambda (I prefer this to my legal name) has a lot to do with my neologism at that time.
severe system crash squared: just my way to say "extremely". This expression was inspired by my special interest in computers back in middle school, and I've been saying this for more than 10 years.
27 Dec 2016, 10:16 am
Oh, and my nephew has started doing something similar aged 3. He doesn't like his toy because it makes "kranchie, kranchie" (it's too noisey). I could really appreciate his concern when he coined this one. 
