"when you tripped i laughed and thought how that was such a hallmark moment  "ewww did you see the new chick? she had such a hallmark moment in science
a hallmark moment is when you have a moment that would be perfect on a card
""when you tripped i laughed and thought how that was such a hallmark moment  "ewww did you see the new chick? she had such a hallmark moment in science" What is the definition of "hallmark moment"?