noun
coin-operated shower stall
A public shower that operates after inserting coins, often found at campgrounds, highway rest areas, or budget accommodations. Wasei-eigo; not a direct English loanword.
wasei-eigo (Japanese-coined English), from coin shower
キャンプ場にコインシャワーがあるので助かった。
There was a coin-operated shower at the campsite, which was a big help.
高速道路のサービスエリアでコインシャワーを
I used a coin-operated shower at the highway rest area.