空喙哺舌 [－－－－]

Jyutping hung1 fui3 bou6 sit3
Pinyin kōng huì bǔ shé

Definitions (Wiktionary)
  1. phrase, Min-Nan, idiomatic
    mere verbal statement is no guarantee
    (syn.) 空口无凭, 無根無據, 无根无据, 空口無憑, 口说无凭, 口說無憑
  2. phrase, Min-Nan, idiomatic
    to give empty talk; to make mere verbal statements
    (syn.) 信口开河, 信口開河