A musical sub-genre that consists of (normally) electronic remixes of audio clips from a famed Youtube channel, Game Grumps. Such songs include "Goof Troop Boof", "Banana Shoes", "BaBoom", and "Ice Hair".
Dude 1: Aw, man! Did you hear that Grumpstep song by xXJerryTerryXx?
One's overall level of grumpiness. Grumpitude, also known as the grumpitude factor or grumpitude quotient is a numerical value, rated on a logarithmic scale similar to that of the richter scale for earthquake magnitude. A grumpitude factor of 6 is 10times higher than a grumpitude factor of 5.
n. similar to dumpster, but instead where happiness goes to die
n. a person that sucks the life out of the room no matter how hard you try to cheer them up
n. dark pit of despair, a black hole of unhappiness, a vacuum that sucks all hope and joy from the vicinity
MD is a grumpster because he will suck all your happiness away.