A tour or excursion of upmost gnar-batch, within a vehicle of the van kind. Usually resulting in the inebriation of all occupants of said van, via excessive drinking of Van Tour Red (official van tour drink).
Generic person 1: hey do you wanna go on a van tour?
Generic person 2: damn right, sounds rad!
a van that smells like weed 24/7, basically the worlds greatest hotbox, impossible not to be stoned
person 1: dude why are you so high
person 2: I just got out of Snoop Dogg's tour van
person 1: makes sense
Snoop Dogg: hell ya