>>1067957Definition 1: The tube of a bicycle that runs from the headtube to the bottom bracket shell.
Definition 2: An idiot, a retard, a faggot, a moron, a fred, a hipster, a casual, etc. It's a generic insult that can be used in a wide variety of contexts, but is generally used in contexts that are at least vaguely related to cycling.
Variations: [Downtuber] (synonymous with downtube), [downtubing] (can be used as an adjective or, less commonly, a verb, to refer to downtubes and things that downtubes do).
Examples (definition 1):
A downtube is a crucial component of a bicycle.
Examples (definition 2):
1. Fred is such a fucking downtube. He's has been a self-proclaimed 'serious cyclist' for 8 years, he's had 12 flat tires in that time, and he still doesn't know how to fix a flat. He just takes his bike to the local bike shop every time.
2. The fact that you ride a fixie in San Francisco, despite it being one of the hilliest cities anywhere, doesn't make you 'cool', it makes you a downtuber.
3. You don't wear a helmet when you ride? What a downtubing idiot.
4. That fucking downtuber Jack probably wishes he was a literal downtube, that way he'd get to enjoy being ridden by bearded men. He acts like he has fucking down syndrome.
