When posting on a forum using very little information and still getting your point across. Often used when the "poster" decideds the subject has too many details to describe or possibly forgets everything but the actual event. The recipiant always catches the reference or the point of the post.
Very similar to telepathy but through a Social Network...
Person #2: Oh yes!! that was so much fun, how's friday?
#1: Perfect, wow you cought on really quickly!
#2: Yeah, i've perfected SNT