Definition of "charge up"

charge up

verb
third-person singular simple present charges up, present participle charging up, simple past and past participle charged up
1. (transitive) To recharge, to give electrical power to something.
2. (idiomatic) To motivate, to instill someone with determination.
3. (LGBT, slang, transitive) To deliberately infect an individual with HIV as part of bug-chasing.
  Quotations
  The subcultural vernacular “I'll charge you up" evokes the act of charging a battery or readying a mechanism for action; […]
  2009, Tim Dean, Unlimited Intimacy: Reflections on the Subculture of Barebacking