(References in plain language to men’s bodies viewed as sexual objects, with a photo, so not suitable for kids or the sexually modest.)
On Facebook yesterday, information from train-watcher Ned Deily about FREDs. That’s FRED, an acronym for flashing rear-end device — an alternative name for end of train device, no doubt devised to provide a pronounceable acronym (FRED) rather than a mere initialism (like ETD). But then we get then nominal rear end, referring not only generally to the back part of something, but also specifically to a person’s buttocks. Which takes us into racy or frankly raunchy territory.
FRED 1, the flashing rear-end device. In brief, from Wikipedia (a) on the end of train device; and then from the Trains & Locomotives Wiki (b) on “End of Train Device” (edited for readability):



