Cut-out form of Tucumán or Tucumán ( a ) . In Colombia it means fear, fear (especially if it is repeated: tucu tucu).
It is an apocope of Tucuman ("gentilicio de Tucumán") and especially of the "empanada tucumana", in its local or Bolivian versions. See tucu tucu , tucu-tucu , cayambicaranqui/tuco , tucu .