When an inhabitant of Northern Europe countries gives unsolicited explanations or advice to someone from Southern Europe, assuming that the latter is too underdeveloped to have actual knowledge of the topic.
Noé: “In Belgium, we have special subsidies to help poor people.”
Pietro: “Stop northsplaining me! I’m Italian, not a savage. I know what welfare is.”
Nerdsplaining occurs when a nerd hears a topic they love and obsess over and can't contain themselves from telling you everything they know about it. Nerdsplaining is about overwhelming excitement on a nerd's favorite subject, not about being condescending in an effort to feel superior.
(Nerd•splay•ning) Verb. To explain a subject, in excruciating detail, to someone who absolutely doesn’t give a shit. Similar to Mansplaining, except the victim is uninterested in the information being forced upon them, rather already aware of it.
My girlfriend had no interest in all of the mythological inaccuracies in Disney’s Hercules, but I couldn’t help Nerdsplaining them to her, anyway.
when one makes an obscure off-the-wall reference in conversation specifically and solely for the purpose of fishing for further inquiry, allowing for the opportunity to explain something they find interesting, then pivot and talk about themselves ad nauseum. This tactic is cunningly deployed to deceive younger and more naive audiences into believing the individual is so interesting that others are asking to know more about them; when in fact they were not interested in the individual, but merely weren't aware of the obscure reference, and dared to ask about it. Those caught in the noorsplaining trap will often find themselves confused and bewildered as to how the conversation got to where it did and with no recollection, while the individual continues to talk about themselves covering topics as wide ranging as the universe itself.