Bathroom 衛生間
e.g. Can I use your bathroom? 我能借用一下你的衛生間嗎?
Restroom 洗手間
e.g. Where is the restroom? 請問洗手間在哪兒?
2. Familiar: appropriate with family or friends. 級別二：朋友、家人，熟人之間均可使用。
Pee 撒尿
e.g. I need a pee really badly. 我真的很想撒尿。
Go (when used in context) 方便一下(需結合上下文，及動作和表情使用)
e.g. Where's the bathroom, I really have to go! 廁所在哪兒，我真的要去方便一下了!
John 茅坑
e.g. I've held it in for so long. I have to visit the John! 我肚子疼，得去茅坑!
My bladder is bursting. 我的膀胱要炸了(快憋不住了)。
e.g. Stop the car! My bladder is bursting. 停車!我憋不住了。
Loo (UK) 廁所(英式英語)
e.g. She's gone to the loo. 她去廁所了。
3. Rude: appropriate only with friends. 級別三：通俗的說法，只能和關系要好的小伙伴們說。
Take a 1/2 (number 1 refers to peeing, number 2 to pooping) 大小便(1指的是小便，2指大便)
e.g. A - I have to go to the bathroom. 甲：我要上廁所。
B - Number 1 or number 2? 乙：小便還是大便?
Crapper 廁所
e.g. Hey man, where's the crapper? 嘿，哥們兒，廁所在哪?
Pee oneself 尿褲子(憋不住的時候使用)
e.g. I'm about to pee myself. Let's go. 我要尿褲子了，走吧。
Can 廁所
e.g. Do you mind telling me where's the can? 不介意告訴我廁所在哪吧?
Take a leak 方便
e.g. Can we stop at the next gas station? I need to take a leak. 我們可以在下—個加油站停一下車嗎?我要方便一下。
