Abbreviation of 'Super Mega Awesome'. To be used only in situations of extreme levels of awesomeness. Considered level 3 on the awesome scale. See Mawesome, Pawesome, Fawesome for other levels.
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.