A Brumby is commonly used as a way to call someone stupid without them realising. Mainly because of the fact that Brumbys seem a bit un-enlightened.
by Llat 051 February 16, 2017
a term developed in the early 2000's used to describe the commom jailbait nigger. commonly used by prison guards to decribe the targets of a newly developed sport called brumby-smashing. either that or to describe the anal rapage of a "brumby" in the showers.
by Brumbysmasher January 07, 2010