something that people do to there breasts. a person supposedly at a sleepover party, pushes there bosoms up twice while repeating "chicka chicka" then releases them, and pushes the sides of them together twice, while saying "boom boom".
Sabina: why are we lying on the floor
sara: i dont know
allison: im bored
sara: well what to you wanna do?
emily: lets do chicka chicka boom boom!