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Verb: hot up (hotted up,hotting up)
Usage: Brit, informal
  1. Make more intense
    "Competition hotted up as the deadline approached";
    - heat up, screw up [informal]
     
  2. Make more powerful
    "he hotted up the old cars";
    - soup up [informal], hop up [N. Amer, informal]
     
  3. Gain heat or get hot
    "The debate started to hot up as more people joined in";
    - heat, heat up

Derived forms: hotting up, hotted up, hots up

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