What does bum puddle mean?

bum puddle meaning in Urban Dictionary

a comparatively little stagnant human body of liquid, typically curbside or near a storm strain, containing a variety of garbage alongside waste. These are generally strange because they exist despite long stretches of small to no rain. The phrase "bum" is affixed since these puddles often have an oily sheen and will include articles of garments, used needles, and broken glass.