To trim or groom ones public Twitter stream by deleting low-value tweets (excessive "at" replies, retweets, or drunken tweets). The goal of tweetscaping is to give the impression that the account owner is an interesting, balanced, and witty individual by highlighting tweets which demonstrate topically, breadth, and humor while removing tweets that reveal the author to, in fact, be narcissistic,
pathetic and/or
bat-shit
crazy.
See also wallscape