1. relating to or resembling a toilet or bathroom
2. characterized by crude or vulgar humor involving bodily functions or toilets
Usage: informal; chiefly British

Examples

• The lavatorial fixtures in the old building needed to be replaced.
• His comedy routine relied too heavily on lavatorial humor.
• The lavatorial facilities at the campground were basic but functional.
• She found his lavatorial jokes immature and offensive.
• The museum's lavatorial architecture reflected Victorian design principles.