400

The sum of people you can follow and unfollow on twitter in a single day and get new follow blocked for 3 days, ratio does not matter, it could be top heavy as in 399 follows and 1 unfollow or bottom heavy with 399 unfollows and 1 follow.

I moved to Seattle and got into the local sporting scene, but Twitter 400ed’ my flow, now I have to fidget with tweets only for the next 72 hours, ooh well, urban dictionary has got me covered.