underslung \un"derslung`\, underhung \un"derhung"\, a.
   of an automobile body, suspended from the springs in such a
   manner that the frame of the chassis is below the axles, the
   object being to lower the center of gravity of the car.
   webster 1913 suppl.

underslung
     adj 1: supported from above especially in a vehicle having springs
            attached to the axle from below
     2: having a lower part projecting beyond the upper; "an
        underhung jaw"; "undershot bulldog" syn: underhung, undershot
     3: having a low center of gravity; built low to the ground
        syn: squat
see also:
underhung undershot squat