Like its cousin the rusty trombone, it is when a guy is eating out a girl's asshole and uses three fingers on her in the front, resembling the playing of a bugle.

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.