
Blarney
Perception of Insincerity
 Be wary, 'blarney' often implies the speaker's charm is insincere and possibly manipulative. 
His promise of unmatched riches was just blarney to get her investment.
 Cultural Origin
 'Blarney' originates from an Irish castle; it's tied to legends of gaining persuasive speech. 
They said that kissing the Blarney Stone would endow me with the gift of blarney.
 Often Pejorative
 Using 'blarney' can be seen as negative, especially if the context suggests dishonesty. 
The politician's promises were dismissed as mere blarney by the skeptical audience.