The shitter, bog or crapper. When you have the turtle head you must return it to the turtle pond!
Let's go.
Give me ten minutes, I've got to visit the turtle pond.
A highly specific (possibly true) excuse for taking a very long toilet visit. Suggested use is mostly for incidents involving defecation.
"Hey guys, I'm back on stream! Sorry I was gone so long, I tried to hurry, but I was Fixing the koi pond... The pump was clogged and I had to clean it out!"