一姐

一姐	yī jiě	(coll.) top-ranked female; leading female; top female personality (in a particular field, esp. in entertainment or sports)
一	yī	one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit
姐	jiě	older sister