look up any word, like half chub:
 
1.
when a woman is SOOO fat, that she appears to have breasts on her back due to a tightish bra.

I once met a fat krusty with greasy ginger wrestler mullet hair of this ilk. and then i found out she had her clit pierced. i was very ill.
Man 1 : oh my f**king days that girl has got back boobs man.

Man 2 : RAHHH!!! that is some nasty shiz-nit
by Ganjzilla!! August 31, 2003
 
2.
When someones shoulder blades are sticking out of their back in a way where they look like boobs/breasts.

This could either happen when they are stretching or standing in a awkward position, or when someone is rather skinny.

On the other hand, it might also refer to people who are obese and have pouches of fat on their back beside their shoulder blades that have the shape of boobs.
Eg1: Elle is becoming so skinny. Yesterday I saw her stretching in the locker room and from the back she looked like she had back-boobs

Eg2: Roohx could you please PhotoShop my back, my shoulders look weird. I look like I have back boobs.

Eg3: Poor thing, she really should wear such tight shirts when shes that large, her back boobs are really popping out there.
by MrBigG August 03, 2011
 
3.
When someones shoulder blades are sticking out of their back in a way where they look like boobs/breasts.

This could either happen when they are stretching or standing in a awkward position, or when someone is rather skinny.

On the other hand, it might also refer to people who are obese and have pouches of fat on their back beside their shoulder blades that have the shape of boobs.
Eg1: Elle is becoming so skinny. Yesterday I saw her stretching in the locker room and from the back she looked like she had back-boobs

Eg2: Roohx could you please PhotoShop my back, my shoulders look weird. I look like I have back boobs.

Eg3: Poor thing, she really should wear such tight shirts when shes that large, her back boobs are really popping out there.
by MrBigG August 03, 2011
 
4.
When an individual is so obese that when viewed from the rear the rolls make it look like there is a set of tits on thier back.
I was in wal-mart the other day and I was walking behind a chick so fat she had DD size back boobs.
by The Haagimus October 23, 2009
 
5.
a fatty deposit on the back that hangs in such a way that it resembles a nippleless breast. May sometimes result from a bra that is too tight, causing temporary back boobs. Mostly seen on very fat women or men with manboobs.
"He's got a sick fetish--he goes to the nude beach just to look at back boobs."
by Mike Oxhard September 29, 2006
 
6.
Sometimes an individual is so fat that the rolls of fat on their back become strange, breast-like appendages. They have a bizarre, hypnotic power. Even though you are mildy repulsed, it is hard to look away once you see a real pair of beauties jiggling like there's no tomorrow on someone's back.
1. Cheryl: Man, check out the back boobs on that femullet! Those have got to be double D's.
Brigid: At least!

2. Jenna: Thank GOD I don't have back boobs!
Cheryl: ...YET!
by BAJohnstonIsMyWeekendDad November 22, 2009
 
7.
In a picture posted on the GameFAQs forums by AlienNine, of his girlfriend's back tattoo, there appeared to be a boob on the back, slightly below the arm.. Yes, a boob on his girlfriend's BACK. Of course, even the dumbest little 12 year old could figure out that it's fat, but...we JUST don't care. Since that day, the "back boob" has become the new...well, the new "confirm/deny". That easy.
Dude, $5 a frieken back boob!
by Anemic Royalty September 20, 2006