Ultimate Tongue Twisters!
 

Woodchuck, Monkey Island Version

Q: How much wood could a woodchuck chuck if a woodchuck could chuck wood?
A: A woodchuck could chuck no amount of wood 'cause a woodchuck can't chuck wood.
Q: But if a woodchuck could chuck wood, how much wood could a woodchuck chuck if a woodchuck could chuck wood?
A: But if a woodchuck could chuck wood, would a woodchuck if it could chuck wood?
Q: If a woodchuck could and a woodchuck would, how much wood could a woodchuck chuck if a woodchuck could chuck wood?
A: It would chuck all the wood that a woodchuck could if a woodchuck could chuck wood.

Anybody else got more?

Spiffy!

I've got a few really fun ones. And one of them might be NSFW if you say it wrong.

Moses supposes his toeses are roses, but Moses supposes erroniously.
Red leather, yellow leather.
black bugs' blood.
I slit a sheet, a sheet I slit, upon a slitted sheet I sit.

and of course, the old standbys.

Peter Piper picked a peck of pickled peppers.
A peck of pickled peppers did Peter Piper pick. -etc. (I always forget how exactly the last two lines go, but they're basically the same trick).

Rubber baby buggy bumpers.

She sells seashells by the seashore.

The big black bug bled thick black blood!

An imaginary menagerie manager
imagining managing an imaginary menagerie.

I love that tongue twister. Also:

Toy Boat.

It is pretty much impossible to say multiple times in a row with out saying "toy boat toy boat toy boyt toy boyt... dangit"

I slit the sheet.
The sheet I slit.
Upon the slitted sheet I sit.

Soldier's Shoulder

Social Welfare Reform Movement

Unique New York

Reputed to be the world's hardest tongue twister:

The sixth sick shiek's sixth sheep's sick.

How many boards would the Mongols hoard if the Mongol Hordes got bored?

Abu 'Abd al-Rahman al-Khalil ibn Ahman ibn 'Amir ibn Tammam al Farahidi al-Zadi al Yahmadi.


Yes, that is a real name. He ironically wrote a now lost text on cryptography in 725 AD.

^ that's also an eye-twister... How do you read that?