A lap-lap is a waistcloth or loincloth worn in Papua New Guinea and the South Pacific.
Related to the lap-lap is the lava-lava, which is an all-round rectangular cloth worn like a kilt or skirt by Polynesians.
This description refers to the traditional, pre-colonial period, costume.
The current usage is broader than this: 'Laplap: a waistcloth, a loincloth, any cloth material or dry goods, a rag'.
[1] It is a Fijian word that is also used in Western Melanesia.{op.