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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
    "Emotions were hotted up";
    - heat up, screw up
  3. Make more powerful
    "he hotted up the old cars";
    - soup up, hop up

Derived forms: hots up, hotting up, hotted up

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