Not exactly an online boyfriend or girlfriend, but a friend online that is of the opposite sex that one spends a considerable amount of time talking to/flirting with on the internet. Most often used by others to describe someone else's situation
A: Where's Susan today?
B: She was up all last night talking to her e-mack, Craig from Canada, so she was too tired to come to school.
used to address someone, could be used by a close friend or an obnoxious person who thinks they are hilarious. similar to buddy boy, "pally boy" is just 'pal' (meaning 'friend') turned into an adjective to describe 'boy'.
Sara: wanna go to lunch?
Hiro: mmmm nah, I'm good.
Sara: alright, see you later then, pally boy.