A person who is half Russian and half Jamaican. A biracial person who is not simply half black and half white but is specifically half Russian and half Jamaican, making them a Russaican. The product of one Russian parent and one Jamaican parent is a Russaican.
Look at that amazingly beautiful, exotic mixed girl with dreads speaking Russian. She must be Russaican!
One of Russian and Mexican ancestry. Incredibly rare in most parts of the world. The Phoenix, Arizona area, is home to a collection of Russican's. Namely William and Colin, who are best categorized in the douchebag nomenclature.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.