Instrument widely used to catch animals by poachers. It is a synonym of dirty tricks, deceptions. In the oil industry is a tank of small dimensions that is used to separate water from the crude collected by perimeter channels oil. It tells them also skimmers or skimmers. Hatch, portanuela, ruse, stratagem, lie, fraud, scam, swindle. In Colombia is the way to evade a rule, how to take advantage of something in an illegal manner.