Definition of "stand up for"

stand up for

verb
third-person singular simple present stands up for, present participle standing up for, simple past and past participle stood up for
1. (transitive) To speak or act in support or defense of (a person, a cause, a belief, or the like).
  Quotations
  Michelle: Quit standing up for yourself, Fry. When we get back to the hole we are going to have a long, boring talk about our relationship!
  2000 December 3, J. Stewart Burns, Futurama, episode 32: “The Cryonic Woman”