obscene (adj.)youdaoicibaDictYouDict
1590s, "offensive to the senses, or to taste and refinement," from Middle French obscène (16c.), from Latin obscenus "offensive," especially to modesty, originally "boding ill, inauspicious," of unknown origin; perhaps from ob "onto" (see ob-) + caenum "filth." Meaning "offensive to modesty or decency" is attested from 1590s. Legally, in U.S., it hinged on "whether to the average person, applying contemporary community standards, the dominant theme of the material taken as a whole appeals to a prurient interest." [Justice William Brennan, "Roth v. United States," June 24, 1957]; refined in 1973 by "Miller v. California":
The basic guidelines for the trier of fact must be: (a) whether 'the average person, applying contemporary community standards' would find that the work, taken as a whole, appeals to the prurient interest, (b) whether the work depicts or describes, in a patently offensive way, sexual conduct specifically defined by the applicable state law; and (c) whether the work, taken as a whole, lacks serious literary, artistic, political, or scientific value.
Related: Obscenely.
palooka (n.)youdaoicibaDictYouDict
"mediocre prizefighter," 1926, of unknown origin, credited to U.S. sportswriter and "Variety" staffer Jack Conway (d.1928). Non-boxing sense of "average person" is from Joe Palooka, hero of Ham Fisher's comic strip.
popular (adj.)youdaoicibaDictYouDict
early 15c., "public," from Middle French populier (Modern French populaire) and directly from Latin popularis "belonging to the people, general, common; devoted to or accepted by the people; democratic," from populus "people" (see people (n.)).

Meaning "suited to ordinary people" is from 1570s in English; hence, of prices, "low, affordable to average persons" (1859). Meaning "well-liked, admired by the people" is attested from c. 1600. Of art, entertainment, etc., "favored by people generally" from 1819 (popular song). Related: Popularly. Popular Front "coalition of Communists, Socialists, and radicals" is from 1936, first in a French context.