A nuclear weapon the size of a luggage bag. Widely feared because it could be brought into a city and go off without any warning, but impractical in design and neverfully made.
During the Cold War, many NATO leaders feared of coordinated sabotage using suitcase nukes
(v.) Someone annoying you so much by being stupid that you, purposefully on non-purposefully, project your negative feelings onto their friends and isolate them as punishment.
"Shut up; don't make me social nuke you."
"It took me 3 months to recover from that social nuking."