Interesting thread. Since my family is scattered all over the U.S., I enjoy making fun of whatever quirky slang they use when we get together.

Here are some words and phrases that are local to Hawaii...

Stink eye – also known as evil eye, a confrontational/angry glare

Talking stink – also known as talking smack, or gossiping about an individual

Bumbye – eventually, when we get around to it, someday

Choke – a lot, many

Grind – to eat voraciously, Grinds refers to food

Onolicious – really yummy & delicious

Junk – no good, rotten, lousy (used a lot)

No can – impossible, not feasible

Kay den – alright

Try – please

Lolo – crazy, insane or also stupid, idiotic

The mainland – used most commonly in reference to the contiguous U.S.

Slippers – we do not use this term to refer to fuzzy bedroom slippers, but rather what others call thongs, zoris, flip-flops, etc.

We call carbonated beverages soda.
Those are some off the top of my head.