Slang for a person who’s only contributions to discussions are vague, positive statements. Nobody disagrees with them because there’s nothing of substance in what they say. They prevent issues from being discussed because the only response to their feel-good
cliche is a
quiet head nod or other
innocuous affirmation. The conversation typically fizzles out because it’s easy to look like a jackass by detracting from the positive end note in a group setting.
Someone is a genuine Greeting Card when they truly believe their vague positivity accomplished something.
Someone can cynically act like a Greeting Card when they intentionally want to close a hard conversation where they may have to deal with uncomfortable topics or discussions. Watch politicians and corporate executives do it all the time.