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3.
When a woman's bra isn't very supportive and doesn't separate, squeezing the boobs together, thus forming the appearance of one large boob. This usually happens with sports bras.
She needs to go to Victoria's Secret and fix that uniboob!
by Kristina5979 April 29, 2008
 
1.
When it looks like you have one massive breast. This usally happens when a girl wears a sports bra or one of those tank tops with the shelf bra.
The guys at the Gym like to stare at my uniboob.
by Emily Z. February 17, 2006
 
2.
an amorphous undelineated mass of tit, often caused by old age sagginess or bras that squish them together. in theory, it could be a single cycloptic tit.
i think george bush sould have a huge uniboob implanted on his forehead.
by minghi May 22, 2003
 
4.
A case of the rare condition called symmastia, in which a woman's two breasts literally grow together and join in the middle of the chest, so it looks like a single dumbell-shaped breast across the chest. It can be a congenital condition or a complication arising from breast augmentation surgery.
Lisa's plastic surgery went very wrong. Now she has a uniboob.
by capologist July 16, 2009
 
5.
One boob that extends the same distance as if you had 2 boobs. its quite unfortunate and can often happen when so much fat has extended across the barrier from one breast to the other, forming a uni boob.
"yo dude! man your boobs arent individual any more"
"i know dude, coz i totally got uni boob. its the new fashion"
"i should get me one of those"
by lizzie millard November 08, 2007
 
6.
a person you only has one boob right in the middle
"I didn't know Justin Bieber had a Uni-Boob"
by ch5412 May 04, 2010
 
7.
Noun.

1. In art, a singular curve/line/lump of breast used to represent two boobs under clothing.

2. A single mass/breast where two should be, but not where two were originally (if you loose one boob, its not technically a uniboob). A uniboob is the presence of an original single boob.
I was in a rush, so I gave the women in my drawing uniboobs.
by Arthoes December 21, 2007