STOOL PIGEON
stool pigeon 這個短語到底是什麽意思呢？既然 stool 可作『凳子』或『糞便』解，那麽 stool pigeon 是否是指停留在雕像上拉屎的鴿子？抑或和家具有什麽聯系呢？
其實，stool 在這個短語中根本就沒有『家具』或『糞便』的意思，實際上它是 stale 或 stall 的變體，意為『引誘，誘騙』。例如英國的劇作家和詩人莎士比亞的名著《暴風雨》中有這樣壹句話：
"The trumpery in my house goe bring it hither for stale to catch these theeves."
（大意：把房間裏那些中看不重用的東西作為誘餌，目的是為了抓住這群賊骨頭。）
stool pigeon 來源於法語 estale 或 estal，意指用來誘捕老鷹的鴿子。而這壹法語單詞又是從德語 stall 衍生而來的，意為『柵欄』或『固定的位置』。據此可以推斷，stool pigeon 是指『（抓捕犯人的）密探』，當然現在它也有『告密者』之意。
Pigeon English
[perhaps a corruption of business English], an extraordinary and grotesque dialect, employed in the commercial cities of China, as the medium of communication between foreign merchants and the Chinese. Its base is English, with a mixture of Portuguese and Hindoostanee. --Johnson's Cyc
pigeon 在slang中有容易上當受騙的意思，另外，還有特別關心的事務或者是人，比如：
Football is not his pigeon 他不怎麽喜歡踢足球。
a pigeon pair 壹男壹女的雙胞胎。
另外，put/set the cat among the pigeons 的意思是招惹麻煩。
在醫學上，壹些和這個詞有關系的壹些詞匯如下：
1. pigeon brest 雞胸，不是鴿胸啊，呵呵
2. pigeont-toed 足內翻的
以下是網上各位回復的關於鴿子的詞組：
(as) harmless as a dove 和善得象鴿子，象鴿子壹樣無害於人
as mild as a dove 非常溫和
dove of peace 和平鴿
bird of peace 和平鴿
doves and hawks dove 鴿派和鷹派
In the whole affair, he played the role of a humiliated stool pigeon.
pigeon-livered 溫柔的
pigeon's milk 不存在的事物
pigeonhearted 膽小的, 害羞的
One who is easily swindled; a dupe. 傻瓜容易上當受騙的人；易被愚弄的人
clay pigeon 清潔的衣服
carrier pigeon 信鴿
be someone's pigeon: Originally this expression was "that's not my pidgin". The word 'pidgin' represents a 17th century Chinese pronunciation of the word 'business'. The expression literally meant the same as "that's not my business".
e.g: I'm sorry to load this on you, Harry, but I'm selfishly glad it's your pigeon rather than mine.
put/set the cat among the pigeons: to cause trouble, esp. by doing or saying something that is unexpected or excites strong feeling pigeon-hole:
a.（文件或信箋的）分類格架，常用於被動語態
I put (papers, and ect.)in a pigeon-hole, and ingore it.
b.分類，歸檔，尤指硬性的
She flet her son has been pigion-hole as a problem child.
pigeon English 洋涇浜英語， 英漢夾雜語
pigeon hawk (美國產的)壹種小鷹
pigeon house 鴿籠，鴿舍
pigeon retina 鴿視網膜