hot up phrasal verbphr v British EnglishBrE informal a) INCREASE IN ACTIVITY, FEELINGS ETCif something hots up, there is more activity or excitement 加剧，变得激烈 Things generally hot up a few days before the race. 比赛的前几天气氛通常会变得热烈起来。
b) the pace hots up used to say that the speed of something increases 速度加快
the pace hots up• Remember this when the pace hots up!
→ hot up at hot2(1)