One of the mysteries of the English language finally explained.
Also "piquillin bush". A spiny South American shrub, Condalia microphylla (family Rhamnaceae), with edible fruits.
Late 19th century; earliest use found in William Miller (c1831–1898). From Argentinian Spanish piquillin, perhaps from Quechua (Santiago del Estero, Argentina) pikillín (if this is not itself from Spanish).
In this article we explore how to impress employers with a spot-on CV.