A short sexual encounter where the man unclips the woman's bra and runs his index finger down the middle of her back, the "road", and then proceeds to go to sleep. There is also the possibility of causing a "traffic jam" where the man proceeds to finger the woman for a short moment. After this is done, the woman is often passed over to "the bro", much as a road trip would continue by taking turns driving.
Heather: You should come with me on my next road trip!
Rachel: and sit in a car for several hours in a row? No way!
Heather: no, I'll make it a REAL road trip, where we get food, blast tunes, and stop at cool places!
Rachel: I'm in!
The sensation that becomes travelers after 5+ hours in the car, particularly when driving at night. Road trip Insanity includes saying things that don't make sense, laughing hysterically at things that are not funny, and a general sense of "loopey-ness"
Once travelers have reached the point of Road Trip Insanity, there is not turning back.
Bob- I'm validated!
Tom- I'm inebriated!
Sally- Looks like you guys have a bad case of Road Trip Insanity.
A common thing people get while they are on a road trip. Usually followed by nausea, or the desire to use the bathroom. When children experience this, it is common for them to say: "are we THERE yet?!!!" Parents usually get annoyed with this after a while, and start getting stressed, which leads to some tension in the car. Which can lead to bumpy driving, which leads to nausea. Sometimes, people write Urban Dictionary definitions of this whilst they have Road trip boredom.