A person who does not react, post or comment on social media at all/often although he or she has a social media account so wtf....
Jhonny: wtf Bob! you never react to my memes.
Bob: sorry man, I laughed tho. I'm just social media dumb
a term used to burn triggered people who get easily offended
BoB: most women are materialist.
Anny: okbb.
Bob: you're fucking annoying.
Anny: okbb.
Bob: you retarded idiot.
Anny: okbb