Similar to subtweet but done on Facebook to talk about a Facebook friend by vague-posting behind his or her back.
by discjockzo March 28, 2013
Subposting is sort of like subtweeting but on any platform of social media. Most people subpost with the intention of secretly talking about or referencing (typically a person) that they are angry or annoyed at without directly naming or tagging said person(s). Sometimes subposting can be in a positive manner but usually not as it is an activity usually used by passive-aggressive people.
by random66811 September 3, 2017