This action of ponderance, is often performed while considering email, blog posts, digital information, and urban dictionary submissions.
It is most often used at the end of an email, comment, or Instant message. Much like LOL, TIA, ROTFLMAO.
OfficeHottie: So you say I am a hottie and you want to wine and dine me, eh?
I will get back to you.
Typical age range for a SIB is between 25 and 29, but there have been reported SIB sightings in women as old as 32.
Dude, did you just see how hot that SIB was, she was perfect!
SIB Conversation (Actual):
Young Man: Hey girls, how old are you?
Attractive Busty Woman and friend: Ummm...26?
YM: Wow that's perfect, you guys are just what we were looking for, SIBs!