Not so hot also is a way of saying that you do not really like something.

VOA: special.2009.12.06

I of course picked the wrong day to wear a sweatshirt under really hot lights so thankfully I came prepared with another item from the-- from the store.

当然，我在主光灯下穿了件运动衫，这确实不太明智,幸好我过来时,从商店准备了另一件。

哈佛公开课 - 计算机科学课程节选

so it's hot yoga. So I can't really do that.

很热的瑜伽。所以在这里没法子练。

喜欢曲棍球 - SpeakingMax英语口语达人

So it gets really hot really quickly.

NPR: Senate to Debate Bush's Guest Worker Proposal

So you might wonder whether medical hot-spotting can really succeed on a scale that would help large populations.

NEWYORKER: The Hot Spotters

"They put the wind up us a bit yesterday by knocking us over so quickly but I was really pleased with the way the boys fought today in pretty hot conditions, " said Australia coach Tim Nielsen.

BBC: Australia on brink of victory over West Indies in Perth