rana 20
In lunfardo is someone "cunning, clever, advantageous", who can be a criminal, but not necessarily since it is associated more with someone mischievous and sympathetic who always finds a way to get what he wants with little effort. The origin is not clear, it may be the apocope of "ranero", an inhabitant of the now disappeared and marginal neighborhood Las Ranas, of Buenos Aires, where there was a lake with many frogs (batrachians) easy to hunt; They were very humble people, some miscreants but in general many hustlers, who always found some changa to eat something more than frog soup. Another possible origin is a variation of the word rante ("apheresis of torrant").