Normally people found in high schools during lunch,
they stand with a group of friends
pretending that they're "hanging with them" while
in reality they aren't saying anything and add nothing to everybody else's fun. They most likely don't have any
real friends to hang out with.
Another variety of loose change is rolling change, where a group of friends are walking and the loose change is following behind them.
During the
first week of high school, I was loose change to the
football team.
"Dude, look at William.....he's just rolling change to those
gangsters walking around the South gym"