馴なれ馴なれしい

i-adjective

overly familiar; too friendly; cheeky

Describes behavior or speech that is inappropriately casual or intimate, often implying a lack of respect for social distance. Can be used for someone who acts like a close friend without having earned that closeness.

• 初しょ対たい面めんなのに、彼かれは馴なれ馴なれしい口くちをきいた。

  Even though it was our first meeting, he spoke to me in an overly familiar way.