"turf, slice of earth with grass on it," mid-15c., apparently from Middle Dutch sode "turf," or Middle Low German sode, both related to Old Frisian satha "sod," all of uncertain origin. Perhaps the notion is water saturation and the group is related to sog. The (old) sod "Ireland" is from 1812.
c.1400, "to cover with sod," from sod (n.). Related: Sodded; sodding.
in sod off (1960), British slang term of dismissal; see sod (n.2).
A person who makes ice-cream sodas and other treats at a soda fountain: She worked for a while as a soda jerk/ the champion soda jerker of the United States
[1883+; fr earlier beer jerk, ''tapster,'' perhaps fr the action of drawing back on the vertical handle that controlled the flow of beer; perhaps also related to jerkwater]