The gift of the gab.

The gift of the gab( idiom) - ability to speak easily and to persuade people to do what you want - umiejętność zagadania kogoś, przekonywania kogoś do czegoś, elokwencja
gab - gadać, gadanie, gadanina
Jeśli takiego daru nie posiadacie, jest na to sposób. Trzeba jechać do Irlandii, udać się do zamku Blarney, tam pocałować pewien kamień - i załatwione! Kamień jest co prawda usytuowany w takim miejscu, że trzeba się trochę pogimnastykować, ale czego się nie robi...
https://www.youtube.com/watch?v=ByTaHTv5HQM
The Stone of Eloquence

For over 200 years, world statesmen, literary giants, and legends of the silver screen have joined the millions of pilgrims climbing the steps to kiss the Blarney Stone and gain the gift of eloquence. Its powers are unquestioned but its story still creates debate.

Once upon a time, visitors had to be held by the ankles and lowered head first over the battlements. Today, we are rather more cautious of the safety of our visitors. The Stone itself is still set in the wall below the battlements. To kiss it, one has to lean backwards (holding on to an iron railing) from the parapet walk. The prize is a real one as once kissed the stone bestows the gift of eloquence. 

Read more: http://www.blarneycastle.ie/pages/kiss-the-blarney-stone