Anyone know what these letters stand for on this pin...?

[DPBOB]

Any help would be appreciated.....Thanks.......
It's about the size of a penny
The back is a screw type ( complete )

[kimsdad]

Looks like S-C-A-M. Yeah that's it, it's a SCAM!!!

Or does it stand for
Society of
Cranky
A$$
Mother#(@#^!s

If it does, I think I lost it and I want it back!

[gollum]

Confederate States of America Militia?

Maybe a post-civil war lapel pin for a CSA Veteran?

Best-Mike

[Lowbatts]

It appears to have a large S/C, small M and the pi symbol above the M. Eh, I'm thinking it might have belonged to some bakers from a cavalry unit. The 2nd Cav Pie Men....

Looks pretty cool!