Lateral cleavage refers to the display of a woman's breasts from the side; a term more polite than sideboob.
While my prom dress did have a little lateral cleavage, it was still okay since I used dressmakers' tape to keep the nipples from being exposed.
by eViL pOp TaRt February 16, 2013
Lateral cleavage is partial exposure of your breasts from the side. Also known as "sideboob" by the crude at heart.
by Cranberry Bob November 17, 2019