White Castles may be considered synonymous with the term "sliders", but not exclusively so.
I used to fly low-level reconnaissance sorties in the Sea of Japan. By low-level, I mean taking a 4-engine Boeing WC-135 (looks like a 707) down to 1000-1500 feet, occasionally down to 500 feet altitude, letting the systems get a good sniff of transport layer winds.
It's a damned bumpy ride in that neck of the woods at that altitude, and to do it for 8+ hours at a time, one got tossed around inside the plane just as much if not more than the plane itself did. The fact that we weighed over 250,000 pounds and were going over 300 knots didn't mitigate the punishment we received in the least bit. Barf bags were actually part of the preflight checklist, I kid you not.
Enter the MAC (now AMC) passenger terminal at Yokota AB, Japan. They had a snack bar/restaurant there that made all sorts of goodies. Usually I had yakisoba with rice on the side, or chili on rice. However, if the weather forecast for our sortie that day said it was going to be a hellish, bumpy ride, we all ordered the same thing. Greasy Sliders, we called them. Big double cheeseburgers dripping with grease and melted cheese, turning the wrapping paper transparent, along with french fries just as well lubricated. Sometimes the guys would order a fried egg to be added to the burger, for extra measure. One thing was for certain - they went straight to the bottom of one's gut, and STAYED THERE. No kidding. A really rough flight might produce some burbles of high-humidity flatulence, but that's what oxygen masks were for. Nobody yakked a Greasy Slider, and that was a Good Thing. Flying along at that altitude and airspeed with one hand holding a barf bag was uncomfortable, and potentially distracting when reaction time was at a premium.
It didn't take new members of our crews long to discover our secret, after their own episodes with the cute plastic bags packaged so neatly in small yellow envelopes. Sure enough, Greasy Sliders became part of the mission routine, right after crew briefing and before preflight, about 1.5 hours prior to engine start.
