1. Clinker minerals extracted from a mine; German gang ("vein, reef"). 2. Paragoge in Spanish of the English voice gang ("clique"), which is used with the same meaning. 3. Ave columbiforme, called by an onomatopoeia of your song (something like "gang-gang"), little appreciated meat to eat. 4. It is also something that is a good price, as bargains (birds) were sold cheaper in the markets, the phrase "it's a bargain" was used to name something that is worth little, but then it changed to something which costs little but has value.
