Etymology
Advertisement
straight (n.)
1640s, "a level position," from straight (adj.1). From 1864 as "straight part of a race track." Poker sense attested from 1841. Meaning "conventional person" is first recorded 1967, from straight (adj.2).
Related entries & more 
Advertisement
outsider (n.)

1800, "one who is on the outside" of a boundary, barrier, etc., from outside; figurative sense of "a person isolated from conventional society" is first recorded 1907. The sense of "a race horse not included among the favorites" is from 1836; hence outside chance (1909).

Related entries & more 
gangsta 
rap style generally credited to West Philly hip hop artist Schoolly D, but as for the word itself, his "Gangster Boogie" (1984) used the conventional spelling; NWA was spelling it gangsta by 1988.
Related entries & more 
vanilla (n.)
Origin and meaning of vanilla

1660s, "pod of the vanilla plant," from Spanish vainilla "vanilla plant," literally "little pod," diminutive of vaina "sheath," from Latin vagina "sheath of an ear of grain, hull of a plant" (see vagina). So called from the shape of the pods. European discovery 1521 by Hernando Cortes' soldiers on reconnaissance in southeastern Mexico. Meaning "flavoring extracted from the vanilla bean" is attested by 1728.

Adjectival meaning "conventional, of ordinary sexual preferences" is by 1970s, probably from the notion of whiteness and the common choice of vanilla ice cream; vanilla as figurative of a plain and conventional choice (without reference to sex) seems to date to the late 19c. as a noun, by 1940s (often plain vanilla) as an adjective.

Related entries & more 
grundyism (n.)
"social censorship of personal conduct in the name of conventional propriety," 1836, from Mrs. Grundy, prudish character in Thomas Morton's 1798 play "Speed the Plow," play and playwright otherwise now forgotten, but the line "What would Mrs. Grundy say?" became proverbial.
Related entries & more 
Advertisement
icky (adj.)
1935, American English, probably from icky-boo (c. 1920) "sickly, nauseated," which probably is a baby talk elaboration of sick (adj.). Originally a swing lover's term for more sentimental jazz music; in general use, "sticky and repulsive," from 1938. Also a noun, "person with conventional taste in jazz," 1937.
Related entries & more 
bromide (n.)

compound of bromine and another metal or radical, 1836, from bromine, the pungent, poisonous element, + -ide. Used medicinally as a sedative; figurative sense of "dull, conventional person or trite saying" popularized by U.S. humorist Frank Gelett Burgess in his book "Are You a Bromide?" (1906). Related: Bromidic.

Related entries & more 
pin-stripe (adj.)

"fine stripe repeated as a figure on cloth," 1882, from pin (n.), on the notion of long, slender, and straight, + stripe (n.1). Characteristic of the uniforms of many baseball teams from 1907 and after. Suits of pin-stripe cloth being the conventional garb of the mid-20c. businessman, the word came to be figurative of "executive" by 1958.

Related entries & more 
strait (n.)
mid-14c., "narrow, confined space or place," specifically of bodies of water from late 14c., from Old French estreit, estrait "narrow part, pass, defile, narrow passage of water," noun use of adjective (see strait (adj.)). Sense of "difficulty, plight" (usually straits) first recorded 1540s. Strait and narrow "conventional or wisely limited way of life" is recorded from mid-14c. (compare straight (adj.2)).
Related entries & more 
mention (v.)

"make mention of, speak of briefly or cursorily," 1520s, from mention (n.) or else from French mentionner, from Old French mencion. Related: Mentioned; mentioning. Not to mention as a "rhetorical suggestion that the speaker is refraining from presenting the full strength of his case" [OED] is by 1690s. Don't mention it as a conventional reply to expressions of gratitude or apology is attested from 1840.

Related entries & more 

Page 2