noun
mobile phone enthusiast; heavy mobile user
Wasei-eigo from English 'mobiler'. Refers to someone who loves using their mobile phone, often for communication, apps, or browsing.
wasei-eigo (Japanese-coined English), from mobiler
彼は一日中スマホをいじっている、本当にモバイラーだね。
He's always on his smartphone all day; he's a real mobile phone enthusiast.