Phone Drunk

(adj) - A lack of coordination and/or concentration while performing a task caused by the simultaneous use of a cellular device.

#1.
Person1: that girl is staggering around trying to put a sign up while on her phone.

Person2: She's Phone Drunk.

#2.
Person1: Wow she crashed into that guy's car because she was distracted by her cell phone.

Person2: Sounds like she was Phone Drunk.