a) you have had too much mountain dew
b) you have been at a sleepover and it's really late
c) you have been on the phone for way too long
everything becomes funny, even if it isn't.
other forms of phone drunkenness include:
b) It was 1 o'clock in the morning and when Chelsea laughed at the dog eating chocolate, we all thought she was phone drunk.
c) After an hour on the phone Sandra and Lily were laughing at the oddest things. They were a bit too phone drunk.
Person1: that girl is staggering around trying to put a sign up while on her phone.
Person2: She's Phone Drunk.
Person1: Wow she crashed into that guy's car because she was distracted by her cell phone.
Person2: Sounds like she was Phone Drunk.