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