It means born, resident or related to Costa Rica. It is the apocope of Hermaniticos, which was how it was called between if members of the liberating army and its allies in their battles against the Buccaneers. This colloquial Word, gave rise to Costa Rica, also began to call Recientes. Is clear that in Central America (and obviously in Costa Rica) and Colombia there is the tendency to repeat the tico suffix or ico, diminutives to strengthen them and demonstrate exaggeration, so it is common to hear words such as cortiquitico, Shorty, rapiditico, etc.
