flout (v.)Related entries & more
"treat with disdain or contempt" (transitive), 1550s, intransitive sense "mock, jeer, scoff" is from 1570s; of uncertain origin; perhaps a special use of Middle English flowten "to play the flute" (compare Middle Dutch fluyten "to play the flute," also "to jeer"). Related: Flouted; flouting.
frump (n.)Related entries & more
"cross, unstylish person," especially a woman or girl, 1817, from a group of related words of uncertain origin: Frump (n.) "a mocking speech" (1550s), "a sneer or snort" (1580s); frump (v.) "to mock, flout, taunt" (1570s); frumps (n.) "ill-humor" (1660s); frumpish (adj.) "cross-tempered" (1640s); and compare frumpy.
flaunt (v.)Related entries & more
1560s, "to display oneself in flashy clothes," of unknown origin. Perhaps a variant of flout or vaunt. Perhaps from Scandinavian, where the nearest form seems to be Swedish dialectal flankt "loosely, flutteringly," from flakka "to waver" (related to flag (v.1)). It looks French, but it corresponds to no known French word. Transitive sense, "flourish (something), show off, make an ostentatious or brazen display of" is from 1827. Related: Flaunted; flaunting; Flauntingly.