1.(n)An unfinished beer that someone discarded on the street in an upright and still usable position.
2.(v)The act of strolling crowded streets getting drunk off such beers.
1. I assumed that the cold, frothy lager was a most excellent of floor beers, until it's owner careened out of the bar howling obscenities at me.
2. Floor beering is a fun, free, easy way to drink yourself under the table, but one must be wary of beers that have doubled as ashtrays.