1. Yeah, right.
2. You're kidding.
3. You're pulling my leg.
4. That's a bit of an exaggeration.
5. He's stretching the truth.
6. He's not telling the whole truth.
7. She's being economical with the truth. (= she's lying or not telling the entire truth)
8. His story is fishy.
9. That's an outright lie.
10. That's a pack of lies.

Fact
Knowledge is growing so fast that ninety per cent of what we will know in fifty years time, will be discovered in those fifty years.      .. More >>