Taken from the Internet.
Thanks to Robert T. Bond for the first 20 items.
New items are added to the bottom of the page.

On the grave of Ezekial Aikle in East Dalhousie Cemetery, Nova Scotia:
    Here lies 
    Ezekial Aikle 
    Age 102 
    The Good 
    Die Young.

In a London, England cemetery:
    Ann Mann 
    Here lies Ann Mann, 
    Who lived an old maid 
    But died an old Mann. 
    Dec. 8, 1767

In a Ribbesford, England, cemetery:
    Anna Wallace 
    The children of Israel wanted bread 
    And the Lord sent them manna, 
    Old clerk Wallace wanted a wife, 
    And the Devil sent him Anna.

Playing with names in a Ruidoso, New Mexico, cemetery:
    Here lies 
    Johnny Yeast 
    Pardon me 
    For not rising.

Memory of an accident in a Uniontown, Pennsylvania cemetery:
    Here lies the body 
    of Jonathan Blake 
    Stepped on the gas 
    Instead of the brake.

In a Silver City, Nevada, cemetery:
    Here lays Butch, 
    We planted him raw. 
    He was quick on the trigger, 
    But slow on the draw.

A lawyer's epitaph in England:
    Sir John Strange 
    Here lies an honest lawyer, 
    And that is Strange.

Someone determined to be anonymous in Stowe, Vermont:
    I was somebody. 
    Who, is no business 
    Of yours.

Lester Moore was a Wells, Fargo Co. station agent for Naco, Arizona in the cowboy days of the 1880's. He's buried in the Boot Hill Cemetery in Tombstone, Arizona:
    Here lies Lester Moore 
    Four slugs from a .44 
    No Les No More.

In a Georgia cemetery:
    "I told you I was sick!"

John Penny's epitaph in the Wimborne, England, cemetery:
    Reader if cash thou art 
    In want of any 
    Dig 4 feet deep 
    And thou wilt find a Penny.

On Margaret Daniels grave at Hollywood Cemetery Richmond, Virginia:
    She always said her feet were killing her 
    but nobody believed her.

In a cemetery in Hartscombe, England:
    On the 22nd of June 
    - Jonathan Fiddle - 
    Went out of tune.

Anna Hopewell's grave in Enosburg Falls, Vermont has an epitaph that sounds like something from a Three Stooges movie:
    Here lies the body of our Anna 
    Done to death by a banana 
    It wasn't the fruit that laid her low 
    But the skin of the thing that made her go.

More fun with names with Owen Moore in Battersea, London, England:
    Gone away 
    Owin' more 
    Than he could pay.

Someone in Winslow, Maine didn't like Mr. Wood:
    In Memory of Beza Wood 
    Departed this life 
    Nov. 2, 1837 
    Aged 45 yrs. 
    Here lies one Wood 
    Enclosed in wood 
    One Wood 
    Within another. 
    The outer wood 
    Is very good: 
    We cannot praise 
    The other.

On a grave from the 1880's in Nantucket, Massachusetts:
    Under the sod and under the trees 
    Lies the body of Jonathan Pease. 
    He is not here, there's only the pod: 
    Pease shelled out and went to God.

The grave of Ellen Shannon in Girard, Pennsylvania is almost a consumer tip:
    Who was fatally burned 
    March 21, 1870 
    by the explosion of a lamp 
    filled with "R.E. Danforth's 
    Non-Explosive Burning Fluid"

Oops! Harry Edsel Smith of Albany, New York:
    Born 1903--Died 1942 
    Looked up the elevator shaft to see if 
    the car was on the way down. It was.

In a Thurmont, Maryland, cemetery:
    Here lies an Atheist 
    All dressed up 
    And no place to go.

Bedfield, Suffolk, England,
    "24/3/1744 Wm Jaye was buried being the last of this name in the parish and an end of a very worthless, malicious, ill-natured family having for ages been remarkable for oppressing and as much as in them lay for defrauding the Ministers of this parish of their just dues which character this person kept up to the last day of his life. Witness my hand, Richard Temple, Vicar of Pettistree" 
    -- This item appeared in Missing Links, A Weekly Newsletter for Genealogists, Vol. 3, No. 48, 27 November 1998 
    Attributed to Barbara Ferdinand KHSF26A@prodigy.com 
    Missing Links is published by Julia M. Case and Myra Vanderpool Gormley, CG.

Item added Feb. 29, 2000.
    Two men were walking home after a party and decided to take a shortcut through the cemetery just for laughs. Right in the middle of the cemetery they were startled by a tap-tap-tapping noise coming from the misty shadows. Trembling with fear, they found an old man with a hammer and chisel, chipping away at one of the headstones.
    "Holy cow, Mister," one of them said after catching his breath, "You scared us half to death -- we thought you were a ghost! What are you doing working here so late at night?"
    "Those fools!" the old man grumbled. "They misspelled my name!"