nepalese hand sandwich
is when you’re stuck without anywhere to take a dump, so you dump in your hand. Comes from tradition in Nepal, where the word for “hand” is the same for the word for “toilet”.
Dude, on the way to work today I took a Nepalese hand sandwich!
I was stuck in traffic without anywhere to take a dump so I had to take a dump in my hand and toss it out the window.