A person or individual who chats, posts or postures about social change but does nothing more than just that. A chatactivist will never actually do the work or make personal changes needed to impact or make the social and / or environmental change actually happen that they appear to be promoting.
Susan, a chatactivist, posts on Facebook all the time about the need to not eat GMO foods while regularly having her daily lunch at McDonald's. Tom blogs regularly about all the local protests for social change, but yet he has never been known to attend a protest making him appear to be a chatactivist. Due to the fact that Karen tells her co-workers why they should donate to charities yet Karen has never been able to show she herself has donated, her co-workers call her a chatactivist. showing that she has ever donated. Sandy didn't consider herself a chatactivist even though she was smoked two cigarettes while she was preaching to others about the chemicals in our air and rivers.