Qué mae mas carga!
If you want to really learn Spanish in Costa Rica, you need to learn the sayings and slang. You may be listening to a conversation between two Ticos, or Costa Ricans, and not understand a single word of it! Ticos are famous for their creativity and use of sayings, or dichos, to get their point across. Check out this list of Costa Rican dichos and and this list of slang and give 'em a try (con cuidado!) the next time you find yourself among a group of Ticos!