\Mud"sill`\, n.
The lowest sill of a structure, usually embedded in the soil;
the lowest timber of a house; also, that sill or timber of a
bridge which is laid at the bottom of the water. See {Sill}.

\Mud"sill`\, n.
Fig.: A person of the lowest stratum of society; -- a term of
opprobrium or contempt. [Southern U. S.]