Insults from times past
These glorious insults are from an era before the English language got boiled down to 4-letter words.

The exchange between Churchill & Lady Astor:
She said, "If you were my husband I'd poison your tea."
He said, "If you were my wife, I'd drink it."

A member of Parliament to Disraeli: "Sir, you will either die on the gallows or of some unspeakable disease."
"That depends, Sir," said Disraeli, "whether I embrace your policies or your mistress."

"I am enclosing two tickets to the first night of my new play; bring a friend.... if you have one."    George Bernard Shaw to Winston Churchill
"Cannot possibly attend first night, will attend second... if there is one."    Winston Churchill, in response.

"He has never been known to use a word that might send a reader to the dictionary."    William Faulkner (about Ernest Hemingway)

"Poor fellow. Does he really think big emotions come from big words?"     Ernest Hemingway (about William Faulkner)

"Thank you for sending me a copy of your book; I'll waste no time reading it."    Moses Hadas

"I didn't attend the funeral, but I sent a nice letter saying I approved of it."    Mark Twain

"He has all the virtues I dislike and none of the vices I admire."    Winston Churchill

"I have never killed a man, but I have read many obituaries with great pleasure."    Clarence Darrow

"He has no enemies, but is intensely disliked by his friends."    Oscar Wilde

"I feel so miserable without you; it's almost like having you here."    Stephen Bishop

"He is a self-made man and worships his creator."    John Bright

"I've just learned about his illness. Let's hope it's nothing trivial."    Irvin S. Cobb

"He is not only dull himself; he is the cause of dullness in others."    Samuel Johnson

"He is simply a shiver looking for a spine to run up."    Paul Keating

"In order to avoid being called a flirt, she always yielded easily."    Charles, Count Talleyrand

"He loves nature in spite of what it did to him."    Forrest Tucker

"He had delusions of adequacy"    Walter Kerr

"Why do you sit there looking like an envelope without any address on it?"    Mark Twain

"His mother should have thrown him away and kept the stork."    Mae West

"There's nothing wrong with you that reincarnation won't cure."    Jack E. Leonard

"He has the attention span of a lightning bolt."    Robert Redford

"A modest little person, with much to be modest about."    Winston Churchill

"They never open their mouths without subtracting from the sum of human knowledge."    Thomas Brackett Reed

"He inherited some good instincts from his Quaker forebears, but by diligent hard work, he overcame them."    James Reston (about Richard Nixon)

"He can compress the most words into the smallest idea of any one I know."    Abraham Lincoln

"Some cause happiness wherever they go; others, whenever they go."    Oscar Wilde

"He uses statistics as a drunken man uses lamp-posts... for support rather than illumination."    Andrew Lang

"He has Van Gogh's ear for music."    Billy Wilder

"I've had a perfectly wonderful evening. But this wasn't it."    Groucho Marx