Derived from an internet alias;
bulletspawn's are those with an unnaturally exceptional talent at video games and all things nerdy. Unlike traditional nerds a bulletspawn will probably have an admirable social life and is often very handsome or well-hung.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.