spike up

English

Verb

spike up (third-person singular simple present spikes up, present participle spiking up, simple past and past participle spiked up)

  1. (transitive) to cause to become spiky
    spike up your hair
  2. (intransitive) to become spiky
    His hair spiked up
  3. (intransitive) to increase sharply
    Prices are bound to spike up during high season
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