Definitions by Mr. A-Z

Grum 

The spontaneous feeling you get when you suddenly feel pumped/hyped/excited and feel like you can do anything.

You know the feeling when you get it and it comes for no reason what so ever.

I was sitting around and then suddenly felt so grum and jumped up and down and hit things in a spantaneous moment of excitement

Grum by Mr. A-Z September 15, 2007