Chupacabra555: After all these years, this single image finally made me look up what "Boin" means.....
Its a japanese slang for big breast derived from the english sound effect "Boing", which, as we all know, is the sound ALL big breast make when they bounce ^_^
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Its a japanese slang for big breast derived from the english sound effect "Boing", which, as we all know, is the sound ALL big breast make when they bounce ^_^