FOB

FOB stands for several things:

• Fall Out Boy
  
• Free on Board
• According to investopedia.com that means:

• A trade term requiring the seller to deliver goods on board a vessel designated by the buyer. The seller fulfills its obligations to deliver when the goods have passed over the ship's rail.

• Fresh Off the Boat (Most Popular!)

Whichever definition you prefer, I'm sure this shirt will satisfy you: