look up any word, like half chub:
 
1.
An accident involving a longboard, almost invariably piloted by a typical bro.

This type of accident is increasing exponentially on college campuses nation-wide, as bros-listening-to-iPods cruise to class, utterly oblivious of their surroundings. See figure below.

brollisions _100|--------------------------------X-
per___________| -----------------------------X---
capita_________|----------------------------X----
per___________|---------------------------X------
year__________|-------------------------X---------
___________50-|----------------------X------------
______________|------------------X----------------
______________|--------------X--------------------
______________|-----------X-----------------------
______________|X--X--X----------------------------
____________0-|______________________________
-----------------|---|---|---|---|---|---|---|---|---|
____________2000___02____04_____06____08_09
Observer #1:"Dude - did you see that? Those two longboarders just had a head on collision!"

Observer #2:"That's no collision, man, thats a brollision. Sweet."

#1: "Super sweet"
by biking_beaver May 23, 2009
 
2.
Brollision - (n) (Bro - lish - shun) - an unfortunate event where you walk in to, bump, or graze someone from the Bro community. This event happens particularly frequently if there is a high density of Bro's around.
I accidentally went to the bar during the NCAA Basketball tourney....had like 10 Brollisions in 2 minutes.
by Marcus_msoe April 12, 2011