the term originates from stank gay bars and san fransico back alleys and is used to describe the slop left over from a french sandwhich or as some have came to call it, a butt fuck train. the bilo is the drippage from the middle mans ass. Alt spellings: Below, Bilow, Bilo.
A name that Zane likes to call his brother Milo when his brother acts retarded or stupid. The word's origin is from the movie Borat. Where he talks about his retarded brother named Bilo.