Cellfish refers to an individual who talks on his or her cell phone even when doing so is rude or inconsiderate of other people.

Cellfish指的就是那种只顾打手机，把别人晾在一边的人，这样做对他人很无礼，完全没有考虑到他人的感受。

For example:

"Can't you stop talking on the phone while ordering your meal -- that's cellfish."

“点餐时你就不能不打电话吗——这样很没礼貌哎。”