Oin is the unpleasant taste of metal. Dental fillings taste like oin. If you have accidentally eaten aluminum foil or the effect of scraping a metal pan can have on food, you've tasted oin. Maximum oin is experienced when placing the terminals of a 9-volt battery to your tongue.
CHOM OIN is a way of saying hello to the people you love,you can also use this to express feelings of happiness and encouragement.it’s an abreviation from the expression “come on”but with more feeling in it.