On your hind legs - Idioms by The Free Dictionary
on your hind legs
on (one's) hind legs
Standing upright, especially to deliver a speech. Come on then, stand up on your hind legs and say a few words about this company you've helped create! Forgive me if I seem nervous, but I'm not used to standing on my hind legs in front of a large group of people.
on your hind legs standing up to make a speech. British informal
References in classic literature
If you haven't room to swing round, rear up a little and come round on your hind legs
Extend the neck, chin out, rocking on your hind legs