Can also be shouted when someone gets hit in the balls hard in an embarrassing or stupid incident.
Tim *to hot chick*: Hey baby, are those things real?
Hot chick kicks Tim in the nuts hard.
Tim *lying on ground holding balls*: UGHHHAUUUGH
Tim's friend: GROUCH!
2. Extremely boring and mind numbing organization in the world.
3. Due to lack of interesting services, large amounts of boredom, in addition to the corporate drama, it is the first part of a phrase. (Phrase also known as The Shades of Grouch)
All because of BOREDOM...