to show that something is not true These new figures give the lie to the belief that unemployment is going down.
give the lie to something(formal)jump to other results
to keep something important about yourself a secret from other people, so that they do not know what you really think, what you are really like, etc.
live a liejump to other results
a story, an excuse, etc. that is full of lies
a tissue of lies(literary)jump to other results