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Verb: hot up (hotted up,hotting up)
Usage: Brit
  1. Gain heat or get hot
    - heat, heat up
     
  2. Make more intense
    - heat up, screw up
     
  3. Make more powerful
    - soup up, hop up

Derived forms: hotting up, hotted up, hots up

Type of: change state, compound, deepen, heighten, intensify, modify, turn