noun
comment spam
Unwanted promotional or irrelevant comments posted on blogs, forums, or social media.
ブログにコメントスパムが大量に届いた。
I received a lot of comment spam on my blog.
Variant with interpunct; less common in running text.
スパム is a broader term for any unsolicited bulk messages, including email spam. コメントスパム specifically refers to spam in comment sections.
Loanword from English 'comment spam'.