What does a big safety pin on a biker jacket mean?

Could mean a few things, except on a wannabe IOMC cut. He just bought his at Wal Mart because he thought it'd look cool with his biker whip and bowie knife. The large safety pin originated from the military back in the WW2 days, they were used to keep large laundry bags closed. A lot of MCs were started by vets during that time and the pins have been used in MC culture to represent different things.