a friendly manner that suggests people know each other well, sometimes when this is not sincere

Some viewers have been horrified by the prime minister's mateyness with the president. 一些观众对首相与总统之间称兄道弟的关系十分反感。

This is a family-run business wise enough to know that, while we all like smiles, we don't need mateyness. 在家族经营的企业里，我们都知道彼此友好很重要，但不需要勾肩搭背的关系。