So, "wikiwiki" is basically "very fast" or "hurry up!" It's often used as an exclamation to urge someone to move faster.
The name "Wikiwiki" is also associated with the popular tourist destination "Waikiki", but it's important to note that the two are not related. "Waikiki" is a place name that comes from the Hawaiian words "wai" (water) and "kīkī" (trickling) or "kī" (spout).