So I've been told that the flag print on her bra is the maritime signal flags for Uniform (red and white checkers) right, and Yankee (red and yellow stripes) left. Taken together in that order, they form the signal flag Uniform Yankee, with the intended message of "I am training; keep clear of me". I am now very tempted to add the training bra tag and see if we have one suitable for puns, as well.