Home › Words › S › sideboobsideboob/ˈsaɪdbub/sideboob means the view of the bared breast, as seen from the side, either by design or by accident.sideboob is pronounced /ˈsaɪdbub/.EtymologyFrom side + boob.nounThe view of the bared breast, as seen from the side, either by design or by accident.e.g.“Nothing says J-Lo is back like a slinky, drapey dresslike garment and plenty of sideboob.” — 2009 January 11, “Red-hot carpet gowns”, in Metro Boston, MA:Definitions & examples from Wiktionary (CC BY-SA 3.0).