Allons-y

Allons-y, according to the Tenth Doctor was French for "let's go" (DW: Midnight). Starting from Doomsday, the Tenth Doctor wished to begin using the phrase in earnest, even wanting to say "Allons-y, Alonso" (which did happen in Voyage of the Damned). The last time the Doctor used the phrase was when he was giving a speech to the Vinvocci when they tried to stop him from going back to Earth.

"There's an old Earth saying, captain. A word of great power and wisdom, and consolation to the soul in times of need."

"What's that then?"

''"Allons-y!" - the Doctor and Adams''