Comment Turnover
The amount of time it takes for a comment to be completely wiped off your facebook wall due to newer comments.
"Crap, my girlfriend left me a comment thats gonna make me look like a puss in front of everyone."
"yeah, looks like you've got poor comment turnover so it'll be around for a while!"
"yeah, looks like you've got poor comment turnover so it'll be around for a while!"