A mixture of both "great" and "good" used by the Cheerleader in Teen Girl Squad (issue/tissue#4). Seemingly originated from a spelling mistake by Strong Bad.
Person 1: Hey thats pretty grood
Person 2: what does grood mean Person 1: its a combo of good and great
Person 2: why would someone even combine the two
Person 1: *bitch slap*
An unit of measurement referring to an amount of leftover food that is too small to be a real portion size but too big to eat right then just to get rid of it. It is often a source of irritation after big meals or parties.
Example 1: Does anyone want to eat this grood of guacamole?
Example 2: I hate it when we have a grood of chips left after a party. We can't throw them out but nobody wants to eat them either.