中文互联网中似乎无“diss”之直接翻译，官方也无相应回复，只是民众自发使用。
检询“diss”语义，当是“a shortened version of ‘disrespect’”，同与“disrespect”，即“轻视、怠慢、自大于人”。
如是，则用“睇视”一词最为恰当，义音接近。
睇视，《汉语大词典》：“斜视。《礼记》：‘不敢哕噫…睇视’”。
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供参考：
diss
(dɪs IPA Pronunciation Guide)
Word forms: plural, 3rd person singular present tense disses, present participle dissing, past tense, past participle dissed
VERB
If someone disses you, they criticize you unfairly or speak to you in a way that does not show respect.
[informal]
He believes that his records speak for themselves and ignores those who diss him. [VERB noun]
Youdao
diss
英 [dɪs] 美 [dɪs]
v. <非正式>无礼对待，冒犯（=dis）
n. 无礼的言谈（=dis）
abbr. 论文（dissertation 的简称）
http://dict.youdao.com/w/eng/diss/#keyfrom=dict2.index
诋噬 满含诋毁之意的乱咬