Shath

I don't do anything for them. Vikki does everything—bath-shath, breakfast, potty, dropping, fetching. He's the one who goes for Open Day, sports, dramatics, all that nonsense. Where do I have the time?

Source: wiktionary

The shower did have its day. When it was too rough to take a proper shower, I took a ‘shath’, or a ‘bower’. Take your pick. Anyway, the shower did extremely well while I sat in the bath as the force was so little it was more controllable and I was scrunched up, so I was easier to soak.

Source: wiktionary

The bathroom has a small tub and no shower, just a smooth hose attached to the faucet and hanging limply downward, a neck bent in defeat. “You don't have a shower,” I say, walking back out and feeling the sudden intimacy of being in his space. It's all so quintessentially him: sparse furniture other than floor-to-ceiling shelves packed with books. Elliot watches me as I lean against the hallway wall. The space is tiny, and he seems to fill it with his height and the solid width of his chest. “I don't know if I could handle only having a bathtub,” I babble. “I call it a shath,” he says. “That sounds dirty.”

Source: wiktionary

“Do both. Like when I can't decide between a bath or a shower, I call it a "shath."”

Source: wiktionary