From Longman Dictionary of Contemporary Englisha hot issue/topic etca hot issue/topic etcDISAGREEa subject that a lot of people are discussing, especially one that causes a lot of disagreement The affair was a hot topic of conversation. one of the hottest issues facing medical science → hot
Examples from the Corpus
a hot issue/topic etc• Despite the ominous thunder of global war, the date on which to observe Thanksgiving was a hot issue.• Friday, 29 years after he was slain by a single rifle shot, his assassination is once again a hot topic.• Salah had succeeded in creating a hot issue.• Military service was a hot topic at Oxford in the mid-1950s, too.• Aphid insecticide resistance-a hot topic for beet and potato growers as well as horticulturalists.• Page description languages are currently a hot topic with much being written about the relative strengths and weaknesses of the various offerings. 