On: Don't Worry – It Can't Happen (1940)

[Jaruzel]

  Thus the reaction poohs out as the temperature rises.

'poohs out' ? I've looked up the definition of 'pooh', and there's nothing to indicate what this means in this context, can someone elaborate?

[ConSeannery → Jaruzel]

It's slang, meaning to lose momentum and stop. Saying "died out" or "fizzled out" is more common these days (eg: A spark jumped from the fire but quickly fizzled out on the snowy ground).

[microtherion → Jaruzel]

Euphemism for "poops out".

[stagbeetle → Jaruzel]

I.e shits out, shits the bed.