I'd have to look more thoroughly my logs at home for more, but some I could find straight away...
For one, the party for one of our campaigns has a Magic Missile rock that the cleric picked up in a previous adventure. The command phrase for the rock is "Happy Birthday!", which leads to a fair number of comedic lines.
For two, while not "victory lines" exactly, our cleric does have what we've dubbed "Pelorian Battle Cries". These tend to take the general form of "HOLY <adjective> PELOR'S <relative> IN A <vehicle>!" For instance: "HOLY GREAT BACKFLIPPING PELOR'S SECOND COUSIN IN A PONTOON BOAT!" He's got a whole running gag of them going on... I think he's belted out something like 15 of them so far over the course of things.
For three... we were all fighting a ton of zombies in an abandoned hotel at one point. After fighting them long enough to get a good number of them gathered together, our cleric (same player... what can I say, he's got a good sense of comedic styling), who has the Sun domain and managed to totally nail his turning check, dusts off the whole lot with this:
"BY THE WILL OF THE ALMIGHTY PELOR, BRINGER OF LIGHT, HE OF THE EXTENDED FAMILY, UPHOLDER OF ALL THAT IS GOOD AND JUST, I COMMAND YOU UNDEAD FREAKS TO B****R OFF!"
(Yes, he's a little... odd... for a Pelor cleric.)
Peace & Luv, Liz