hot up

verb4

1. •
   To heat up.
2. •
   (UK, Ireland) To increase in temperature.

   • Wait for the water to hot up before adding the salt.
   • I hotted up my scones.
3. •
   (UK, informal) To become more heated.

   • The choice of a new leader hots up.
   • Bayern München hotted up the title race with a win.
4. •
   (UK, informal) To make or become more sexually appealing, enticing or exciting.

   • We move to Twankey's launderette, where the Aladdin/Bathroomdoor romance hots up. — 1997