1. dk = double kill.

2.dk uniforms refer to the uniforms of male high school students. There are usually sweaters, shirts, ties, lapels, western-style uniforms and other clothing types.

3. The death knight in the frozen throne, and emphasized the duration of death; Stem dk means duck king, which means that many anchors brag about themselves during live broadcast, which is a kind of ridicule; King Da also means that the king is a laughing stock.