Found some interesting words that are not on modern dictionary.
v.: your reaction after looking in the mirror and seeing how much weight you've gained. (From Glenn Purchase, Cambridge)
n.: a person (usually a child) who innately can locate all the hidden cues within any video game and ultimately reach its highest level. (From Linda Cole, Cobourg)
n.: someone whose fame is confined to the Internet.
n.: someone who thinks the world is warmer due to human-made greenhouse gases but doubts the impact will be extreme.
n.: "an employee who maintains a position at a company even though all his duties have been reassigned to other employees."
n.: the litany of gruesome and painful injuries affecting long-distance runners. (From The Telegraph)
n.: the one kid in every school who can turn his eyelids inside out.