sebaceous secretion, 1819, from Latin, from Greek smegma "a detergent, soap, unguent," from smekhein "to wipe off, wipe clean, cleanse," from PIE root *sme- "to smear" (cf. Czech smetana "cream," and cf. smear (v.)). So called from resemblance; a medical coinage, the word seems not to have been used in its literal Greek sense in English before this. Related: Smegmatic.
smegma smeg·ma (směg'mə)
A sebaceous secretion, especially the whitish cheesy secretion that collects under the prepuce of the penis or around the clitoris.
: They never stoop to smear tactics
: His whole campaign was a vile smear of the other party's man • The current term is ''negative campaigning'' (1943+)
[revived in the 1930s in the political context]