road bone 

the occurunce of an unwanted erection during a ride in a car, truck boat, airplane, etc. usually occurs on long trips.

dude, i hope she doesnt see my road bone. I've had it since we left town and i cant get rid of it!

road bone by powderhound February 27, 2010

bumpy road boner 

When you're driving along a bumpy road, and the constant bumping around makes your body get confused due to all the penis flopage occuring within your pants, and to your surprise you get a boner. Also known as a "brb."

While taking the buggy for a spin I got a bumpy road boner and had to lie about why I didn't want to get up from the drivers seat. "I'm just checking the gauges," I said.

bumpy road boner by crazy b February 11, 2005

Road Boner 

A random erection that occurs while drving long distances. Often leads to discomfort and the need to adjust.

I had 73 road boners on the trip to Ohio.

Road Boner by Tim - E June 11, 2006

roadboner 

when you get a boner driving down the highway due to road vibrations. usually starts when thinking about sex coupled with big bump in road. can be quite annoying

i was driving my big rig and thinking about my one-night stand last night. now i got a hella roadboner

roadboner by matt August 22, 2004