bump (http://definr.com/bump)

     n 1: a lump on the body caused by a blow
     2: something that bulges out or is protuberant or projects from
        a form [syn: bulge, hump, gibbosity, gibbousness,
        jut, prominence, protuberance, protrusion, extrusion,
     3: an impact (as from a collision); "the bump threw him off the
        bicycle" [syn: blow]
     v 1: knock against with force or violence; "My car bumped into
          the tree" [syn: knock]
     2: come upon, as if by accident; meet with; "We find this idea
        in Plato"; "I happened upon the most wonderful bakery not
        very far from here"; "She chanced upon an interesting book
        in the bookstore the other day" [syn: find, happen, chance,
     3: dance erotically, as in "bump and grind": dance with the
        pelvis thrust forward
     4: assign to a lower position; reduce in rank; "She was demoted
        because she always speaks up" [syn: demote, relegate,
        break, kick downstairs] [ant: promote]
     5: remove or force from a position of dwelling previously
        occupied; "The new employee dislodged her by moving into
        her office space" [syn: dislodge, displace]