Definition of "Sod" :
noun: surface layer of ground containing a mat of grass and grass roots
noun: an informal term for a youth or man
"The poor sod couldn't even buy a drink."
noun: someone who engages in anal copulation (especially a male who engages in anal copulation with another male)
noun: an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen
verb: cover with sod