gahrr - what you scream when you are a pirate or look like one or go

what you scream when you are a pirate or look like one or got stuck in a pirate costume and can't get out.

I gahrr-ed at the treasure chest like a real pirate, even though I was wearing a shirt from 2012.

My friend tried to be a pirate, but he just gahrr-ed at the sea and cried.

I saw a guy in a pirate costume eating a burrito, and I gahrr-ed at him like it was the end of the world.