'did you see tina eating that chicken soup at lunchtime?'  'yeah i saw those canteen medals on her shirt when she was at the photocopier'
pieces or splashes of food that fall onto one's shirt at lunchtime, and that go unnoticed until a colleague points it out
"'did you see tina eating that chicken soup at lunchtime?'  'yeah i saw those canteen medals on her shirt when she was at the photocopier'" What is the definition of "canteen medals"?