Like this video? Subscribe to our free daily email and get a new idiom video every day!
A particularly poignant, memorable, or emotionally touching moment or event, i.e., one that would be suitable as a greeting card. A reference to the Hallmark brand of greeting cards. Sometimes used ironically or satirically. With so much of the extended family coming to visit, Grandpa's 80th birthday is turning into quite the Hallmark moment!
See also: moment