The feeling of satisfaction, that is so satisfying, you have to convey it verbally. It can be said under the breath, or at the top of your voice - depending on the feeling of satisfaction.
You've had your first sip of beer after a hard days work - yearphh
Yearg, a term used by pirates to expressemotions. depending on the pitch/length/loudness of the yearg, one can interperate the emotion. can be used interchangably with gar.