トイレ

There are several words for toilet.

Toilet is the most common word and means the machine or the room.

Loo 「ルー」is a very common word and means the machine or the room.

WC is less common in conversation but used a lot for signs. WC is water closet and means the room not the machine.

The bathroom is used mainly in the USA.

The bog is crude slang.

In a public place, there are different words for male and female toilets.

Male:

• The gents (spoken only)
• The men's room (spoken only)
• Gentleman (sign only)
• Men (sign only)
• The little boys' room (spoken only; very polite)

Female:

• The ladies (spoken only)
• The ladies' room (spoken only)
• Ladies (sign only)
• Women (sign only)
• The powder room (spoken only; old-fashioned)

When a woman goes to the toilet, she can use the polite expression "I'm going to powder my nose."