Cottage
1.(n) A type of house. Usually found in picturesque locales, such as lakeshores, seashores, the Hamptons, so on. But that's not what you came here to hear about.

2.(n) A public restroom, such as the ones one might find in a public park. These are so named because of their house-like exterior. Use in this context is widely restricted to Europe.

3.(v) The act of anonymously meeting up with a member of the same sex at a public restroom ("cottage" - see above), with the intent of gettin' down n' dirty with them within.
1. Every rich person owns a cottage.

2. I must be getting to a cottage, or I'll soil my knickers!

3. Did you see that guy in the skinny jeans standing by the door of the bathroom? He is so cottaging.