Smooth talk can fool someone for a while, but not for a lifetime.
Tips
memory
花腔 is 'flowery singing' — the elaborate trills that show off a singer's range without saying anything. 耍花腔 is that vocal performance applied to deception: lots of melody, no substance.
register
Colloquial and always negative. Often thrown at insincere promises, salesman patter, or a partner's evasions.