Saying you don't believe

If somebody says something and you don't believe them, there are many ways of saying you don't believe other than the rather childish 'Liar, liar pants on fire!'

10 expressions to Use In Speaking And Writing: 
  1. You're having me on.
  2. You're pulling my leg.
  3. That's a bit of an exaggeration.
  4. That's an outright lie.
  5. That's a pack of lies.
  6. That's a fishy story.
  7. What you're saying is libellous.
  8. A half-truth
  9. That's a fib
  10. That's stretching the truth a bit
How To Use These Phrases In Your English: 
  1. Phrases 1 and 2 suggest that the other speaker might be lying as a joke.
  2. Phrase 3 suggests that the other speaker has described something as larger or stronger than it really is.
  3. Phrase 3 is a strong accusation that the previous statement is totally untrue.
  4. Phrase 5 suggests that the other speaker has made a number of statements and that all of them are untrue.
  5. Phrase 6 suggests that you are suspicious of a statement but you are not sure that it is a lie.
  6. Phrase 7 syas that the statement is untrue and could be punished in a law court.
  7. Phrase 10 is the most gentle of these phrases but often the speaker still thinks the previous statement was a complete lie.
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