Refers specifically to drops of water that form under awnings, signage, building faces, window edges, and generally any object that is above you while you are outdoors. The water is regarded as unsafe because of chemicals, oils, poisonous substances, sewage or other contaminants, do not use the water for drinking.
Jason is walking along the sidewalk and comes to a stop at the crosswalk. He is standing below a McDonalds sign attached to the side of a building. A drop of water detaches from the bottom of the McDonalds sign and lands on Jason's forehead. He steps back and squeels.

Jason: Ahh! I got questionable water on my face!
by blue_doobie June 9, 2023
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