From Longman Dictionary of Contemporary Englishstick up for somebody phrasal verb informalDEFENDto defend someone who is being criticized, especially when no one else will defend them You’re supposed to be sticking up for me!stick up for yourself She’s always known how to stick up for herself. → stick→ See Verb table
Examples from the Corpus
stick up for • I try to stick up for her but sometimes I make fun of her because I want to be like my friends.• They really did pick on her and the only reason was that she wouldn't stick up for herself.• Despite Swan's abuse, Hyacinth stuck up for him.• When push came to shove, I stuck up for him.• She helps William Ernest with his reading and encourages him to stick up for himself at school.• They stuck up for my right to walk as far up mountains as the older children.• That is why you rarely see anyone sticking up for political correctness.stick up for yourself• They really did pick on her and the only reason was that she wouldn't stick up for herself.• She helps William Ernest with his reading and encourages him to stick up for himself at school. 