Ahoo Golzar

A tongue-twister is a phrase that is designed to be difficult to articulate properly, and can be used as a type of spoken (or sung) word game. Some tongue-twisters produce results which are humorous (or humorously vulgar) when they are mispronounced, while others simply rely on the confusion and mistakes of the speaker for their amusement value.

Here are some examples 

A good cook could cook as much cookies as a good cook who could cook cookies

I saw a saw that could out saw any other saw I ever saw.

Betty Botter bought some butter, but she said "this butter's bitter! But a bit
of better butter will but make my butter better" So she bought some better
butter, better than the bitter butter, and it made her butter better so 'twas
better Betty Botter bought a bit of better butter!      

Black bug bit a big black bear. But where is the big black bear that the big black bug bit?

If you understand, say "understand".
If you don't understand, say "don't understand".
But if you understand and say "don't understand".
How do I understand that you understand? Understand!

I wish to wish the wish you wish to wish, but if you wish the wish the witch wishes, I won't wish the wish you wish to wish.

A sailor went to sea To see, what he could see. And all he could see Was sea, sea, sea. 

I thought a thought.
But the thought I thought wasn't the thought I thought I thought.
If the thought I thought I thought had been the thought I thought, I wouldn't have thought so much.

If two witches were watching two watches, which witch would watch which watch? 

Once a fellow met a fellow In a field of beans. Said a fellow to a fellow, "If a fellow asks a fellow, Can a fellow tell a fellow What a fellow means?" 

I slit a sheet, a sheet I slit. And on a slitted sheet I sit. I slit a sheet, a sheet I slit. The sheet I slit, that sheet was it. 

The owner of the inside inn was inside his inside inn with his inside outside his inside inn.

If one doctor doctors another doctor does the doctor who doctors the doctor doctor the doctor the way the doctor he is doctoring doctors? Or does the doctor doctor the way the doctor who doctors doctors?  

If you notice this notice, you will notice that this notice is not worth noticing.              

How many cans can a canner can, if a canner can can cans?
A canner can can as many cans as a canner can, if a canner can can cans.

If a black bug bleeds black blood, what color blood does a blue bug bleed?

If Freaky Fred Found Fifty Feet of Fruit and Fed Forty Feet to his Friend Frank how many Feet of Fruit did Freaky Fred Find?

A tutor who tooted the flute, tried to tutor two tooters to toot. Said the two to the tutor, 'Is it harder to toot or to tutor two tooters to toot?'

Peter Piper picked a peck of pickled peppers,
if Peter Piper picked a peck of pickled peppers,
wheres the peck of pickled peppers Peter Piper picked?             

Kindly kittens knitting mittens keep kazooing in the king's kitchen.

A skunk sat on a stump and thunk the stump stunk,
but the stump thunk the skunk stunk.

I cannot bear to see a bear
Bear down upon a hare.
When bare of hair he strips the hare,
Right there I cry, "Forbear!"

Of all the felt I ever felt,
I never felt a piece of felt
which felt as fine as that felt felt,
when first I felt that felt hat's felt.

Have fun ;)