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."
by CCG15 November 18, 2011
1. "Dunder Miflin does Gettysberg"
2. Dirty Milf does Gangbang
'look at that tall dude wearing a bright pink hat that says DM does GB!'
'yeah what a perv.'
by your mum's helper May 28, 2022