(verb) to engage in nerd-like behavior by spouting knowledge about totally irrelevant or uniteresting topics; to cement your lack of skills at social interaction by demonstrating your proviciciency in an obscure area of study.
(noun) one who engages in sponching behavior
Friend of Sponch: ew, you have snot on your sleeve!
Sponch: Did you know that snot is just a colloquial term for the nasal mucus that's created by the nasal mucosa, and serves to protect the respiratory tract?
Friend of Sponch: Could you please stop sponching in public?