It's a lightweight craft used by douches to move around on the figurative conversational currents to spread their message of doucheness to new individuals who were blissfully unaware of their existence. It also has cupholders, which is the only redeeming quality of the douchecanoe.
"Wow, did you hear what Jim had to say at the party last night?"
"Yeah, he came from nowhere on his douchecanoe and made everyone feel uncomfortable."
Term used to describe the gathering of more than one dudebro or frat boy-type. Such gatherings are generally characterized by matching pastel polos with popped collars, white baseball caps, Heineken, and Jagerbombs.
Used to describe an individual who acts in such a douche-ish manner, simply one douche is not sufficient to describe them. This person encompasses enough douche with their behavior to fill an entire wagon from front to back.
"Oh shit, I knew Greg was going to be at this party. Last time he threw up on my shoes - On purpose. What a douchewagon."
A particularly dangerous form of erupting douche that can go off without warning and expose innocent people for miles around to unsafe levels of douchery.
Oh man that guy on the train was such a fucktard , he managed to piss off everyone in the carriage, what a Douchecano