Talk:RWBY (2015 manga)/@comment-66.110.225.46-20180206103053/@comment-1979284-20180207102926

”いちゃついてないで” says Yang in the original Japanese Manga.

”いちゃついて”, or "ichatsuite" in Romaji, translates to "to flirt around" or "to dilly dally." Alongside the ”ないで” ("naide") part at the end of the word, Yang's pretty much saying "Quit flirting with each other." So it looks like Yang is purposely teasing both Ruby and Weiss here.