厕所

在美国一般都叫rest room或bath room(男女厕均可)或分别叫做 men‘s room 或 ladies‘ room(=powder room)，不过在飞机上，则叫 lavatory，在军中又叫 latrine。至于 W.C.(water closet)仍是过去英国人用的，在美国，几乎没有人使用。

解小便

最普通的说法是 to urinate(名词是 urination)，如果去看病，护士为了化验小便，就会给你一个杯子说：「Will (could) you urinate in this cup?」医生或许也会问：「Do you have trouble urinating?」=Do you have difficulty voiding?(小便有困难吗?)

此外，还有其他的说法：to piss = to take a piss = to take a leak = to void = to empty。 例如：

* I need to piss = I have to take a leak.

* How often do you get up at night to void?(晚上起床小便几次?)

此外，john(j 小写时，不是男人名字)是 bath room 或 toilet 的意思(也叫 outhouse)，这通常是指在户外工作场地所使用的临时或流动性厕所(有时前面也加 portable 一字)。不过也有老外把家里的厕所叫做 john。 例如：

* There are several (portable) johns in the construction site.(在建筑场地有几个临时厕所。)

* He went to the john a few minutes ago.(他在几分钟前上了厕所。)

* The manual labours have to use (portable) johns during their working hours.(劳动者在工作时间内需要使用流动性厕所。)

不过，小孩多半用 to pee 。例如：

* The boy needs to pee.

然而，「小便检查」又叫做 urine test，因为这里的 urine 是化验的样品(specimen)。 例如：

* Do I need a urine test?

注意：to piss off 是片语，又是指对人生气或对事物的不满。不过这是不礼貌的片语，少用为妙。 例如：

* He pissed me off. = He made me angry.

* He always pisses off (at) the society.(对社会不满)

如果「小便」有毛病，也可以告诉医生说：

* My urine is cloudy and it smells strong.(有浊尿，味道很重)

* I have pus (或air)in urine.(尿有泡沫) (pus = cloudy; air = bubble)

* I dribble a little urine after I have finished urinating.(小便后还会滴滴答答。)(即失禁毛病)

* I am passing less urine than usual.(小便的量比平时少)

解大便

一般是用 to make(或 have)a bowel movement 或 to take a shit。如果看病，医生常问：「Do you have regular bowel movement?」(大便正常吗?)(说得斯文些，就是「大肠在转动」)

此外，还有其他的说法： to defecate =to discharge excrement(或 feces)=to take feces (或 faeces)。 例如：

* The patient needs to take a shit. (=to make a bowel movement)

不过，小孩多半是用 to make a poo poo 或 to make a BM. 。 例如：

* The boy had a stinky BM.(大便奇臭。)

但是「大便检查」倒叫做 stool exam，因为 stool 也是一种化验的样品。 例如：

* The doctor has to exam his stool.(医生要检查他的大便。)

放屁

在美语里最常用的是 to expel gas 或 to fart 或 to make (或 pass)gas。 例如：

* 医生有时问：「How often do you expel(或 make 或 pass)gas?」(你放屁的次数很多吗?)

* Is the gas expelled by belching?(是否打嗝后就会放屁呢?)(动词是 belch)

* He said the more he ate, the more he farted.(吃的愈多，放屁也愈多。)

* He has passed more gas than usual within the last two days.(过去两天中，他放屁比平常多。)

* Be careful not to fart in the public.(注意在公共场所不可放屁。)

至于消化不良，大便不通或拉肚子，也有不同的说法。 例如：

* I have an upset stomach.(消化不良) = I have heartburn. = I have indigestion.

(注意：Heartburn 是指胃不舒服，不是「心痛」(heartache)

* Something has upset my stomach for two weeks.(胃不舒服有两星期了。)

* He has(persistent)constipation.(或 irregularity)(他经常便秘。) 或

* He has been unusually constipated.(便秘很反常。)或

* He is having problem with irregularity.(或 constipation); 或

* He has no bowel movement for the past few days.

* He has bouts of diarrhea.=He is having trouble with diarrhea.(他拉了一阵肚子。)

* He can see trace of blood and pus or mucus in his stool(或 bowel movement)(大便时可看到血丝和粘膜。)