Yass. I never got above the rank of shavetail. We were the dogfaces who gave ’em hell at Chateau Thierry. 1962, Joseph Commings, “The X Street Murders”, in The Mammoth Book of Perfect Crimes & Impossible Mysteries, published 2006:
yass en · INTJ · etymology 2
Pronunciation
/jæs/
/jɑːs/
Etymology
Alteration of yes, with likely influence from pronunciation spelling.
Meanings
(qualifier:African-American Vernacular; LGBTQ slang; African-American Vernacular; LGBTQ slang) A strong expression of excitement or admiration.