'Kokoro' means 'heart' ( the feeling/emotion not the body part ) in japanese, so when someone says ' my kokoro is brokoro' it means their heart is broken, or they are feeling down or heart broken.
v. int. The act of a man pushing one's face in between two ample man-breasts, and rocking one's head side to side very rapidly while making a vigorous, lip-vibrating "brrr" sound.