When six guys fuck a chick. Up the ass, vagina, tits, mouth, and she jacks off two guys with her two hands. The guys keep on fucking until all of the guys ejaculate.
To pull tightly on the skin around one testicle and squeeze that testicle up, isolating it. The resulting isolation of one testicle takes on the conspicuous form of a mushroom cloud after an atomic bomb explosion. Performing this trick with both testicles results in the popular "The Brain."
Louis was walking and turned when Carl called his name to see Carl giving him The Atomic Bomb, and he had nightmares about that hellish, veiny testicle mushroom cloud for weeks.
You know that boss enemy in a video game that you can't get past no matter how many sticky bombs or throwing knives you toss at it? It always finds a way to take your face and give it a nice little sitting area on it's mantle. That would be a flamethrowing atomic bomb. Sort of like the "Golden Egg" scenario.
A Flamethrowing Atomic Bomb is an impossible-to-defeat-without-sever-repercussions entity in a video game or in real life that, no matter how many solutions you may toss at it, turns out just won't go down without fucking other shit up.
In a video game scenario:
Average Guy 1: Oh, my god! I'm up to Level 22 with that one boss.
Average Guy 2: Ahh, that guy's a Flamethrowing Atomic Bomb.
AG1: WTF?! I got killed on the first shot?
AG2: Told you, my turn.
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In a real life scenario:
Guy 1: God, Mr. Dink is a fucking flamethrowing atomic bomb.
Guy 2: Why's that?
G1: He wants me to complete all of these TPS Reports by Thursday but I already explained to him that's not my department!
G2: Huh..What does that have to do with a flamethrowing atomic bomb?