(informal, figuratively) salty dog, horndog, man bent on sex, randy man

to keep warm

(figuratively) immediately, spontaneously, in the heat of the moment, off the cuff, without allowing things to cool off, without thinking

boiling hot

(Belgium, informal) enthusiastic

(zoology, dated, of an animal) warm-blooded, endothermic, homeothermic

(informal) (transitive with à) to gladden someone's heart, to warm the cockles of someone's heart, to do someone's heart good, to be heart-warming

(simile) hot as blazes; red-hot; on fire

(informal) to have a narrow escape, to have a close call, to dodge a bullet

(figuratively) to blow hot and cold