Definitions by CCG15

DM does GB 

1. A sexual reference

2. Also in "The Office" meaning "Dunder Mifflin does Gettysburg"

Jim Halbert: "I've been wearing this very pink hat all day (that says DM does GB), and I've been getting weird looks because I'm pretty sure it's a sexual reference."

DM does GB by CCG15 November 17, 2011