Liar

[Sarah]

A person who knowingly utters falsehood; one who lies.

[Sarah]

someone who tells obvious lies just to make themselves look good, but infact make themselves look stupid and pathetic purely because they think everyone acctually believes them!

this is due to insecurity.

[Sarah]

the lowest form of life.

[Sarah]

Liar

1. someone who represents one set of facts, while knowing that a
   different set of facts prevails;

2. (popular) someone who having led others to believe one thing, does
   a different thing; a promise-breaker;

3. (colloquial) someone whose general conduct, level of reliability,
   relationship with truth, and past preformance leave him or her with
   little to no credibility in peoples' opinion;

[Sarah]

One who seeks to decieve.
Such as lieing about being kidnapped. See also: Audrey Sieler

[Sarah]

A dummy who lies to make his beautiful girlfriend feel bad when he was actually doing something else.

[Sarah]

someone who constantly has to make things up to make themself look better.

[Sarah]

A statement made to dishonestly mislead another person.

[Sarah]

THE SLANG DEFINITION: Someone who represents what they're not, especially any undercover law enforcer.