The following are slang terms and expressions to use when you want to express excited approval when something has gone really well!

That’s sweet
That’s awesome
Good job
Well done
Nice one!
Good on ya!
You little beauty
You little ripper

Beauty
You little beauty!
What a beauty!

I caught a really big fish today!
You little beauty!
Check out the really big fish I caught today!
Oh mate! What a beauty!

I’ve finished building my new house!
Oh mate! You beauty!
Mate, your new house looks amazing!
Yeah, she’s a real beauty, isn’t she?

Ripper
You little ripper!
What a ripper!

I came first in the race!
You little ripper!
Check out the medal I won in the race!
What a ripper!

I won a new motorbike at the pub raffle.
You little ripper!
Check out the bike I wont at the pub raffle.
What a ripper!