by Alpha Doug February 10, 2009
BUM (Bunda Unit Measurement) is the system of measurement of bunda in relation to the body. there must be a plus or minus one of bunda measurement relating to the body size is optimum. it is on an scale from 1 - 10 where it can be graphed as body 1-10 and bunda 1-10.
that girls B.U.M is like +2!!!!
by DR. Bunda PHD November 29, 2021