Person in the world of the show Avatar: The Last Airbender who has the power to manipulate/generate fire and sometimes lightning. It is based upon Northen Shaolin and several other styles of Kung Fu.
A firebender could kick your face in AND turn you into a smoldering pile of ashes.
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.