pretty self-explanatory which might arouse the question why?. I don't know why. Why do people feel the need to define "omfg" for example?...but for those who may not know, saggy boobs commonly referred to as saggies, are typically female breast which hang 6 inches inferior to the top set of abdominals. Not necessarily a bad thing unless one has 40+ years of age under their belt (NOTE: there are always exceptions.).
Young Chap: While once observing a porno featuring Beyonce, I noticed that the beautiful young lady had what appeared to be saggy boobs. But I did my research and reluctantly found that she was 3/4 of an inch away from the designated marker.
strangely enough, blind people seem to enjoy these (see the movie Proof with that dude from the matrix and russel "gladiator" crowe).
also a common ice breaker. or floor cleaner. take your pick
1) ahhhhhhhhhhh saggy boobs!! (reaction to watching proof)
2) hey pretty lady ;) i like your saggy boobs
3) hey pretty lady ;) you have really dirty boobs....