Put it near the end of a reaction sequence, after the reveal has sunk in, so it delivers the verdict. Pair it after Oh My God Wow for escalating shock, then follow with Eww Brother Eww to keep the disgusted reaction going.
このサウンドについて
This is a very short spoken reaction clip, lasting under a second, in which a voice delivers the two-word phrase 'so slutty' with a teasing, judgemental edge. It lands as cheeky and a little scandalised, the kind of quick aside that makes a bold outfit or flirty comment feel instantly called out. It works best as a snap reaction rather than a line to build around.