The extreme dehydration and/or thirsty feeling you get after a meal with excessive amounts of salt and/or sodium. Similar, but not related to the "meat sweats".
The "salt flats" ~ noun

After eating a whole order of orange chicken AND pork fried rice, Curtis was 'bound to hit the salt flats hard.
by MiGKomPressoR January 10, 2011
Get the The "Salt Flats" mug.
Usually performed while fucking a woman doggie-style, a man gives a woman the Nevada Salt Flats when he pulls out and cums on her ass and back. He then spreads it across the same area so that, when it dries, it forms a thin, salty, crusty layer resembling the thin layer of crusted salt covering the Nevada Salt Flats. Can also be done on the stomach or face, if you can find a woman who will let you jiz on her face, spread it all over, and let it dry.
I was fucking that bitch from behind last night but I didn't wanna knock her up so I gave her the Nevada Salt Flats!
by St. Dorothy Mantooth February 8, 2008
Get the Nevada Salt Flats mug.
Usually performed while fucking a woman doggie-style, a man gives a woman the Nevada Salt Flats when he pulls out and cums on her ass and back. He then spreads it across the same area so that, when it dries, it forms a thin, salty, crusty layer resembling the thin layer of crusted salt covering the Nevada Salt Flats. Can also be done on the stomach or face, if you can find a woman who will let you jiz on her face, spread it all over, and let it dry.
I was fucking that bitch from behind last night but I didn't wanna knock her up so I gave her the Nevada Salt Flats!
by St Dorothy Mantooth February 1, 2008
Get the Nevada Salt Flats mug.