"Long boobs" is a term which is used when one's boobs are long, not necessarily hanging, but just having an shape which have similar properties as a long object. It's important to take note that the term "Long boobs" only should be used in occasions where it is used as a compliment.
"Swanoogle my broogle, you have long boobs today. Nice!"
"W'up bro, yo ma nig' yo tit' ies r pret'ty darn long to'day my brodda."
"Air boobs" is a term used to define the area of chest where a ladies chest balls should be but aren't
Some people have "air boobs" due a natural slow growth rate however others are caused by actions such as deviance, betrayal and the influence of bad friends
"hey bro did you see that photo? The one with jemmas friends all admiring her boobs?"
"Yeah bro, but idk what they're looking at all I see is air, air boobs, AIR BOOBS"