Yaass, also spelled as Yas, Yaasth or Yas Queen, and other combinations of As and Ss, is an excited affirmative statement or word of encouragement used in favor of someone's style or appearance. The phrase is often associated with use by gay men. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.