The gift of (the) gab British American noun phrase informal
It can use in posivtive or negative situation.
The ability to converse confidently and easily in a way that makes people pay attention to you and believe you.
He has got the gift of gab which is essential to do in sales.
I don't argue with him because of his gift of gab.
She has got the gift of gab, so she should become a lawyer.
This expression originates from the word 'gob' in Middle English, meaning mouth, and 'gabbe' meaning idle speech.
To begin to decline or deteriorate decline; to get worse very quickly
After his leg's injury, his skiing career hit the skids.