Something ugly, used or comparisons.
by Gumba Gumba April 13, 2004
Get the horse's arsemug. by David from Kingsbury November 8, 2003
Get the horse's arsemug. by Mr Ben February 10, 2005
Get the Horse's arsemug. One who cannot consume his quota of Black Horse within the alloted time of a right nuts chug contest. Punishment for being a horse arse is usually being left out on the road once passed out.
by Jim Bartlett February 2, 2008
Get the horse arsemug.