Cock-a-hoop

Origin

Origin uncertain.

Full definition of cock-a-hoop

Adjective

1. Exultant, very happy, triumphant.
• 2008, Lucy Cavendish, The Guardian, G2, 9th January 2008, p. 3:I have to say I felt pretty cock-a-hoop straight after my epidural but, some hours later, my head felt as though someone large and heavy had been sitting on it.