On (one's) hind legs British phrase informal
Used to say that someone stands upright, especially while giving a speech.
Then he stood on his hind legs, perfectly still, looking all around him.
I have been asked to stand on my hind legs and say a few words on the issues of the hour.
I'm not confident to stand up on my hind legs in front of a lot of people.
To stand up straight because one wants to show their anger, prestige or determination
1. Stand as straight as one can
2. Stand up straight in order to show anger
To stand up.
To swiftly or suddenly stand up or leap up.
To stand up quickly