That's an old term. I've heard it said and have used it, myself, at least, since I was a teenager.
https://en.wiktionary.org/wiki/RUD#English
https://en.wiktionary.org/wiki/RUD#English
Noun
rapid unplanned disassembly (plural rapid unplanned disassemblies)
(engineering, euphemistic) An explosion or breakup of a vehicle, usually an airplane or a rocket.
Usage notes
(explosion): This is also formulated in slightly altered forms, as Rapid Unscheduled/Unexpected/Unplanned/Uncontrolled (self-)Dissassembly, with the "U" varying between forms, and "self" occurring in some variants.
rapid unplanned disassembly (plural rapid unplanned disassemblies)
(engineering, euphemistic) An explosion or breakup of a vehicle, usually an airplane or a rocket.
Usage notes
(explosion): This is also formulated in slightly altered forms, as Rapid Unscheduled/Unexpected/Unplanned/Uncontrolled (self-)Dissassembly, with the "U" varying between forms, and "self" occurring in some variants.
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