口若悬河

舌灿莲花？

Hi, it is 'Silver tongue' and not 'Sliver tongue' :-) 'Silver tongue is an expression used to describe a person who is able to clearly and effectively express themselves, or who has a clever way with words' - Wikipedia

"你真是油嘴滑舌" 容人说话油滑轻浮,耍嘴皮子.