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A view of the female breast seen from a side; generally under loosely-fitting clothes. Very titillating (pun intended) and sexual without showing any overt nudity.
There is so much sideboob at Los Angeles awards shows!

My brother's g/f's sideboob totally distracted me from my own g/f.
by Nutty J September 17, 2005
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Oct 27 Word of the Day
The time between Christโ€™s birth and the beginning of the coronavirus.
In late 2016 AD or 3 B.C.V., Donald Trump was elected as the 45th President of the United States of America.
by JDS12 March 27, 2020
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n. What is seen when a topless woman (or very fat man) turn far enough to the side to see the breast, but not the nipple. Many movies, in order to keep a PG-13 rating, show only side boob. Braless women who wear sleeveless t-shirts are notorious for side boob.
"My roommate's girlfriend was wearing his muscle shirt without a bra. It was side boob city."
by FuryOfDerwin September 15, 2005
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Sideboob, a very large sexy individual who is loving and caring. He also looks as he is a sideboob. His real name is Camden
via giphy
by B4rney April 06, 2019
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The portion of a woman's breast visible from the side due to loose fitting or skimpy clothing, such as a vest with no top or bra, through the arm of a tank top, or a button undone.
One of Marianne's buttons popped, revealing generous side boob.
by gigablip September 16, 2008
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The side view of a female breast that is usually unintentionally exposed by a female wearing a loose shirt or revealing bathing suit. Arguably almost better than actually seeing a fully exposed breast, the sideboob is the "profile" of a breast without exposure of the nipple. The side boob gives you a great sense of what you are working with while also keeping it PG-13.
Her side boob is out of control in that shirt
by EFP3 April 28, 2009
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A womans boobs from the side. Often gives a better perspective of the size, and shape of the boobs.
"She has nice side boob!" - Easton Michael
by Jeremy Robinson November 27, 2007
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