When one says “take a dump” I often cringe, not that I am unappreciative of Aristophanic humor. No. I enjoy scatology in extreme moderation. Not so often, that is. Yet, when I hear this phrase, I read it as inaccurate. Is there any taking? Does one “take” when one performs that bodily function? I have never witnessed any taking. I suspect it is rare that anyone else has seen, or even heard, a taking taking place, except in some cases where there is a fetish concerned. No it seems that one drops, yes? It seems that one lets go. One lets free, and liberation is the consequence, certainly. But, let us ask the question. Is it a taking so much as it is a freeing?
I suggest “drop a load.”