Any taxi, car, minivan, motorbike, hovercraft or other method of automotive vehicular transport seen in the vicinity of a popular nightclub or bar, intent on ferrying gaggles of intoxicated mid-twenties women; either as fare or as an attempt to gain sexual favours.
"Dude, we're not going to get a cab from here. These are all slagwagons."
Jennifer's friends convinced her there was nothing wrong with getting blind drunk and taking a slagwagon home.
(noun) A wildly unpredictable situation, person, or thing that unexpectedly becomes a hit or gains massive attention despite being chaotic or messy.
"That new indie game is such a slapwagon. It looks janky, but everyone loves it."
"The party turned into a total slapwagon when the karaokemachine caught fire, but somehow, it was the best night ever."