A build up of food grease that occurs when you are being a massive vagina and use a keyboard instead of a mic to comunicate when eating.
Andy: Oh no, i've got keyboard grease!
Olly: you silly sausage, you should be using your mic to comunicate not your keyboard.
Olly: you silly sausage, you should be using your mic to comunicate not your keyboard.
by dah commie monster October 28, 2013