Google translate なめた口 as "Licking Mouth" but I was sure it was not a right translation. I also tried to search for it on weblio & alc but didn't get any results... I do found alternative writing such as "なめた口を聞く" or "ナメ口きく"...
I read random image with that word and roughly see it as "talking lowly/bad about someone?", "looking down at someone" or "casual talk" . In anycase, it seems I cannot found out what it means...
Could you help to affirm the meaning of the phrase? And are there any resources to find translation of a phrase like this?