Bite the bullet
To face a difficult or unpleasant situation bravely.

Caught in a lie
To be discovered telling a lie.

Pull the wool over someone's eyes
To deceive someone by concealing the truth.

Cry wolf
To raise a false alarm.

Lie through one's teeth
To lie blatantly and shamelessly.

White lie
A harmless or trivial lie, often told to avoid hurting someone's feelings.

To pull a fast one
To trick or deceive someone.

Have a finger in every pie
To be involved in many different activities, often implying dishonesty.

Bend the truth
To manipulate the truth or distort facts.

Lie low
To keep out of sight or avoid attention, especially after doing something wrong.

Keep a straight face
To maintain a serious expression while lying or hiding amusement.

Spin a yarn
To tell a long, often exaggerated story.

Lead someone on
To deceive someone into believing something that is not true.

Jumping on the bandwagon
To adopt a popular activity or trend, sometimes insincerely.

The truth will out
The truth will eventually be revealed, despite lies.

Throw someone under the bus
To betray someone for one's own benefit.

False front
A deceptive outward appearance.

Cover up
To hide the truth about something.

A pack of lies
A complete and utter lie or falsehood.

Smoke and mirrors
Deceptive actions or illusions meant to mislead.