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Or making a dump

That's a great question and a good point. I never take anything with me when I'm done

I’ll sometimes mention I got to go the bathroom and ask if they want me to bring anything back.

hmmm, this is confusing indeed

I'll change my ways from now on

I've heard people using that version of the expression, but that was long ago. Maybe it's more common outside the US? Language is funny that way.

Or a piss.

Same thing,

That’s tomorrow’s thread

Ah I understand. You have a plan all laid out for this.

Masterfully crafted evil plans. Hahahaahahaaha.

You are getting to the bottom of things...pun intended.