What does 'Un peu plus de Mouv't' mean in my music?

I am getting ready for our state solo and emsemble competition and I am looking for pieces to play on French-Horn in January for this competition, and one piece I came across called Romance Opus 36 for Horn and Cello (and Piano) by Camille Saint-Saens has 'Un peu plus de Mouv't' written over a few measures and I was wondering if anyone could tell me what that possibly means? Please give as much detail as you can. Thank you! :)