lie like a tombstone

lie like a tombstone

To lie brazenly and barefacedly. Possibly from the fact that tombstone epitaphs favor positive descriptions of the deceased over factual characterizations. My brother always lies like a tombstone to get out of trouble with our parents. I just can't understand how they still believe him at this stage. You know you have true power when you can lie like a tombstone, know that people don't believe you, and know that they'll go along with what you say regardless.
See also: lie, like

lie like a tombstone

To tell an untruth. Epitaphs written on headstones often exaggerate the deceased's relationships, accomplishments, and even personal data. The dearly departed may not in fact have been “beloved by his family” or “a brave soldier” or even born in the year in which he did indeed first see the light of day. Therefore, “here lies” can have a dual meaning.
See also: lie, like