Noun. A fool, simpleton (obs.); now, a foolish, conceited, showy person, vain of his accomplishments, appearance, or dress; a fop; 'a superficial pretender to knowledge or accomplishments'. (OED)

Alternate word for seamstress. (OED)

Noun. A person who deals in textile fabrics, esp. silk, velvet, and other fine materials; spec. a member of the worshipful Company of Mercers, a livery company of the City of London. Also (occasionally): a dealer in haberdashery. (OED)

v. to beg ernestly for, entreat (a thing). (Oxford English Dictionary)

Phrase. Used as exclamation or mild oath. (OED)