blarney
Smooth, flattering talk; the power of persuasion.
“‘None of your blarney, sir — I know a cozening tale when I hear one.’”
Note: Hotten's 1864 Slang Dictionary: ‘Blarney, flattery, powers of persuasion’ — from the Blarney stone at Blarney Castle, County Cork, which grants eloquence to whoever kisses it.