When a director is clearly trying to be clever and force a Chekhov's Gun into their story, but it's painfully obvious what it is.
*obvious twistvillain picks up a knife in a dedicated close-up shot*
protagonist: woah! you're clearly gonna kill me with that knife! this director fucking sucks, what a chekhov's atom bomb
The act of a very large gay man fucking another gay (or sometimes strait) Man so hard his molecular structure fails and leaves nothing but atomic traces
Paul: I'm gunna do some Atom Bombing this weekend you care to join?
Joe: Paul how many fucking times do I have to tell you I'm strait you fuckingfag!!!!