Cross Mark Button on Reddit

What it signals here

upvote context

Used in comment threads to mark a claim as incorrect or to signal disagreement before providing a correction.

community use

Appears in list posts (e.g., 'things that are ❎') as a shorthand rejection symbol.

subreddit meaning

Common in r/mildlyinfuriating, r/unpopularopinion, and debate subreddits to dismiss arguments.

karma context

Low karma posts sometimes get ❎ reply-bombs as a community downvote signal beyond the actual downvote button.

See it elsewhere