1795-1805; < French: noun use of fichu, past participle of ficher to drive in, fix (informally, to throw, fling; hence, something put on hastily, loosely attached) < Vulgar Latin*fīgicāre, for Latinfīgere; cf. finca
1803, from French fichu (18c. in this sense), apparently a noun use of the adj. fichu "carelessly thrown on," from Latin figere "to fasten" (see fix). "[M]od. substitution for a coarser word" [Weekley].