When the man puts his tongue up the anus of another man then swirls his tongue around as the other man deficates and the resultant faeces looks like a hurricane. the faeces is then eaten by both parties.
Guy 1) dude i could go for an ice cream right about now
Guy 2) lets just have a brown hurricane
n. comes from the brown hair around a persons asshole which resembles a hurricane; swirling curly hair around an asshole.
Man I had to pull out the weed-eater on that girls brown hurricane last night, I couldn't fight through the forest all by myself!