boku wa toire

This is a very informal masculine way of saying that you need to use the bathroom in Japanese.

Don't be surprised, though, if you're chatting along with a Japanese tourist, and he happens to tell you, "Excuse me for a second. I'm a toilet." In this sentence, boku means I, and toire means toilet, and wa is just the subject particle. So "boku wa toire" literally translates to "I am a toilet."

Bull. Since there is no verb, the sentence just says "I, toilet", and the listener is expected to deduce "...am going to the..." from context. Things like that are very common in Japanese, especially sentences without a subject are quite normal. This makes the language a bitch for translation engines.