A hallmark moment is when you have a moment that would be perfect on a card. It doesnt matter if its funny or not, it just has to be card material.
"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."
"Ewww did you see the new chick? She had such a hallmark moment in science."
by juliett May 19, 2009