Tongue twister

A tongue twister is a phrase in any language that is designed to challege the speakers of proper articulation.

Examples:

• Peter Piper picked a peck of pickled peppers,
  If Peter Piper picked a peck of pickled peppers.
  How many pickled peppers did peter piper pick?
• Toy boat [repeated]
• Unique New York [repeated]
• I slit a sheet a sheet I slit upon a slitted sheet I sit. (Steve Martin's The Jerk
• She sells sea shells by the sea shore.
• How much wood would a woodchuck chuck if a woodchuck could chuck wood?
• Red lorry, yellow lorry [repeated]

More examples from Ajay:

• Betty bought a butter, but the butter was bitter, so Betty bought another butter to make the bitter butter better!
• The sixth sikh shaikhs' sixth sheeps' sick :(
• Road-roller [repeated]
• Liril [repeated fast]

Tongue twisters in other languages:

Mandarin

(known as 繞口令)

• xi1 shi1 si3 shi2 si4 shi2 si4 (西施死時四十四)
  translation: Xi Shi (a famous woman) died at age 44.

The following is a famous tongue twister found in ancient Chinese literature. It was a short story written exclusively with various tones of several similar sounding syllables: xi, shi, si etc.

• 施氏食獅史

石室詩士施氏，嗜獅，誓食十獅。氏時時適市視獅。十時，適十獅適市。是時，適施氏適是市。氏視十獅，恃矢勢，使是十獅逝世。氏拾是十獅屍，適石室。食時，始識十獅實十石獅屍。試釋是事。

Cantonese

(known as 急口令)

• ming5 ding2 bing1 ding1 ting4 ding6 ting3 (酩酊兵丁停定聽)
  translation: The drucken soldier stopped and listened.
• fu6 fu5 fu4 fu1 fu6 fu3 fu2 (傅婦扶夫赴富府)
  translation: Fu's wife carried her husband to the rich man's mansion.

Tongue twisters in Marathi (Indian) language - By Ajay

• Kacha papad, pakka papad [repeated]
• chataila tachni tochli
• LuLi mule baaLe

A collection of tongue-twisters in several languages

http://www.uebersetzung.at/twister/