rail water

Water that is served from a bartender’s “speed rail”, the area or rack right in front of the bartender that holds the most used liquor and mixers, for easy access. Bars and pubs may offer bottled water, but the choice of rail water prevents additional recycling of plastic bottles.

Me: "Hey bartender, could I please have a rail water?"

Bartender: "You want that real water?"

Me: "Yeah, fresh off the rail!"