gain heat or get hot;
"The room heated up quickly"
make more intense;
"Emotions were screwed up"
make more powerful;
"he souped up the old cars"
- It took a long time to heat up the stove.
- Her mother is hotting up the milk.
- Tension is building up in the old part of the city.
- Tell us a joke to liven things up.
- The game didn't heat up until the second half.
- hot up 加热