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when you and another person (usually your boyfriend/girlfriend) stay on the phone all night while sleeping so they are the last person you talk to before you go to sleep, and the first one that wakes up says goodmorning and wakes up the other person
John: hey wanna have a phone sleep over tonight?
Carly: Sure! I'll charge my phone to get ready!
by happymeme February 03, 2011
what weird, perfect couples do
Jack: Phone Sleep Over?
Jill: Sure!

Jack: Goodnight!
Jill: Goodnight!

Jack: Goodmorning!
Jill: Goodmorning! <3
by kittentoitle January 04, 2012