
Blarney
Perception of Insincerity
Be wary, 'blarney' often implies the speaker's charm is insincere and possibly manipulative. 
Cultural Origin
'Blarney' originates from an Irish castle; it's tied to legends of gaining persuasive speech. 
Often Pejorative
Using 'blarney' can be seen as negative, especially if the context suggests dishonesty. 