Sunglasses, for obvious reasons.
Not underwear or part of a revealing bikini, but flip-flops.
Wild or crazy; mentally deranged. It’s said that Australian troops in the Pacific during World War II used the phrase “to go troppo” to describe those whose sanity had been affected by the conditions in the tropics.
Also yakker and yacker. Hard work. From “yaga,” a term for work in the indigenous Yagara language.