- sleaze (n.)
- "condition of squalor," by 1967, back-formation from sleazy. Meaning "person of low moral standards," and the adjectival use, are attested from 1976.
- unnatural (adj.)
- early 15c., "not in accord with physical nature," from un- (1) "not" + natural (adj.). Meaning "artificial" is attested from 1746; that of "at variance with moral standards" is from 1520s. Related: Unnaturally; unnaturalness.