1. top-post - Noun
2. top-post - Verb
top-post (plural top-posts)
(Internet, dated) A post on an online forum whose contents are placed above a quoted message which is being replied to.
top-post (third-person singular simple present top-posts, present participle top-posting, simple past and past participle top-posted)
(transitive, intransitive, Internet, dated) To make a top-post.