Chi-Bu Share definition Flag To push someones head (from behind, and them not expecting it) downwards..(while doing this, one needs to say "un chi-bu" or make a kissing noise) Shh, be quiet. im going to give him un chi-bu Chi-Bu by 98542476925 August 2, 2011 0 0 Get merch Get the Chi-Bu mug. Buy Now — $32.95 See more merch