The rear & side portions of the heel of the foot between the horizontal load bearing bottom and the vertical. This part of the foot cracks and becomes painful if the dead skin is not removed. Condition exacerbated in people that normally wear boots/shoes and then wear open heeled footwear in a hot dry climate.
Girl: My bweebs hurt, I need to get a pedicure.
Guy: There is bweeb-stone in the shower.
"I need to de-bweeb my feet."