Green’s Dictionary of Slang

excellent! wonderful!

1924		P. Marks Plastic Age 6: Sweet! Cripes, that old hen made him sick.
1988		Eble Campus Sl. Mar. 9: Lebo hit for three agin! Sweeeeeet!
1989		in G. Tremlett Little Legs 114: The manager or the owner arrived at half past ten. Sweet!
1990		R. Gool Cape Town Coolie 59: ’Ow’s all those Cape Town steakies? [...] You could fix me up with some Malay goosie? Okay. Sweet.
1996		J. Cameron It Was An Accident 96: Yeah, sweet, Doc, go right ahead ask them questions.
2006		C. Hiaasen Nature Girl 241: ‘Once upon a time I had a book published.’ ‘Sweet.’.
2010		L. Redhead Thrill City [ebook] ‘You’re on a job, aren’t you?’ [...] ‘Sort of,’ I admitted. ‘Sweet!’.
2011		S. Kelman Pigeon English 87: Sweet. I told you it’d work.