Veni, vidi, vici

"Veni, vidi, vici" was a Latin phrase that Geoff Noble uttered after returning home from a football match. His daughter, Donna Noble, heard this, and later recited the phrase to a Pompeiian stallholder to test out the TARDIS translation circuit. Much to her surprise, the merchant thought she was speaking Celtic. (TV: The Fires of Pompeii)

Behind the scenes
Though not elaborated on in Fires, "Veni, vidi, vici", meaning "I came, I saw, I conquered", was famously said by Julius Caesar after victory in a short war against. The implication is that the football team that Geoff supported won the match.