Meaning

noun surface layer of ground containing a mat of grass and grass roots

noun an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen

noun someone who engages in anal copulation (especially a male who engages in anal copulation with another male)

originFrom Middle English sod, sodde first attested in the mid-15th century, from Middle Dutch zoden (“turf”) or Middle Low German sôde, soede (“turf”), both related to Dutch zode (“turf”), German Sode (“turf”), Old Frisian sātha (“sod”), all being of uncertain ultimate origin.

Etymology from Wiktionary, CC BY-SA 3.0