Sega kid
In the late 80's to early 90's, the kid who owned a Sega Genesis as opposed to a Nintendo (or a Super Nintendo in the 90's). Unless they were spoiled and owned both.
Jason: Let's go to Joe's house and play Super Mario Brothers.
Patrick: No, he's a Sega kid so we'll have to play Altered Beast.
Patrick: No, he's a Sega kid so we'll have to play Altered Beast.