backreading
Scrolling up (or scrolling down, depending on the chat app) through a group chat reading every. single. message.
"Dude, why were you online in the group chat but didn't say anything?"
"Sorry, I was backreading about 1000 messages."
"Dude, you have no life."
"Sorry, I was backreading about 1000 messages."
"Dude, you have no life."