In 2K2, it was "Everybody say...Yatta!"
In 2K3, it was "Badgerbadgerbadgerbadger MUSHROOM MUSHROOM."
Now, in 2K4, it appears to be "Come to Kenya, we've got lions!"
(This has been stuck in my head all day. Well, either this, or "My Immortal.")
[if Kenya were to physically urinate all over Norway as well as metaphorically* this path would most likely ensure greatest coverage *this is a fairly rare occurrence though]