brain trail 

Retracting the steps in the mind that lead back to where one bookmarked a certain site in one's browser.

A line of text reminded me of an image I bookmarked in my browser last month that I wanted to show the writer, so I went on a brain trail.

brain trail by Loola April 11, 2008

trail braid 

When you lack the skills to ride sections of a particular trail, so you go around technical features and obstacles, creating easier paths that go to the same place.

Stop making trail braids, you amateur. Improve your skill, not the trail.

trail braid by bikerag August 25, 2006

brainrail 

To forcibly fuck somebody or something's head so hard that your penis (or some other foreign object) penetrates that somebody or something's brain.

If that parrot doesn't shut up I am totally going to brainrail it.

brainrail by Cat Milker August 19, 2011

BRAINTRAIN 

THE ACT OF PENILE INSERTION THROUGH ONES NASAL CAVITY.

YO, ME AND MY HOMIES DONE RAN DA BRAINTRAIN ON DAT BITCH

BRAINTRAIN by JACKRAT September 26, 2008