The Collaborative International Dictionary
Cooling card
Cooling \Cool"ing\, p. a.
Adapted to cool and refresh; allaying heat. ``The cooling
brook.''
--Goldsmith.
Cooling card, something that dashes hopes. [Obs.]
Cooling time (Law), such a lapse of time as ought, taking
all the circumstances of the case in view, to produce a
subsiding of passion previously provoked.
--Wharton.
Wiktionary
cooling card
n. (context obsolete English) Something that dashes hopes.