FYI, fire hydrant chic is Gigi’s bottom line concern when you bring home the next “super cute” but highly embarrassing freak-wear costume from Petco or PetSmart.
A person who's going on and on about a subject they're interested in, not letting others get a word in edgewise. By spewing a constant stream of information, they become the human equivalent of an open fire hydrant.
Jeez, Jon, you haven't stopped talking about 3D printingall night; you're being a real verbal fire hydrant!