have (one's) tail up(redirected from have his tail up)
have (one's) tail up
To have an optimistic, confident, or happy outlook, mindset, or attitude. We know we have a huge challenge ahead of us, but we have our tails up because of our strong performance so far this season, and we'll do everything in our power to get a win.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.