Here's how to talk like a Pirate!

Ahoy! - "Hello!"
Avast! - Stop and give attention. It can be used in a sense of surprise.
Aye! - "Why yes, I agree most heartily with everything you just said or did."
Aye aye! - "I'll get right on that sir, as soon as my break is over."
Arrr! - "Arrr!" can mean, variously, "yes," "I agree," "I'm happy," "I'm enjoying this beer."