bullshit artist

(noun) (slang) someone who is very good at saying stupid and untrue things

Example Sentences:

That salesman is such a bullshit artist. He lied to me about how old this car is!

Man: Baby, if you have sex with me tonight I’ll respect you in the morning.
Woman: No way! You’re such a bullshit artist! Leave me alone!

Media:

Similar idioms:

1. bullshitter
2. bullshit
3. facepalm
4. cockblock