Grindrrhea 

A short-lived mysterious illness, typically a sore throat, that follows a particularly busy weekend of casual sex with multiple partners, making it impossible to pinpoint the original source.

"Gurl, my throat is killing me from that weekend of fun and I don't know who gave it to me. I think it's Grindrrhea!"

Grindrrhea by TrblMkr June 8, 2013

grindhead 

an offshoot of the term "metalhead"

a term used to describe those whose musical preference leans toward Grindcore and all of its sub-genres including:

GOREGRIND
PORNGRIND
CYBERGRIND
DEATHGRIND

ETC...

Grindheads and metalheads are known to get along famously

grindhead by HATEFUCKED February 27, 2007

grebo 

West Midlands slang word for rockers, bikers, greasers etc. In the late 1980s it was used by the UK music press to refer to a specific scene centered around the bands Pop Will Eat Itself and Crazyhead. The term never found favour with readers of 'the inkies' (Sounds, Melody Maker and the still extant NME) and was soon dropped. Now often used in predominantly working-class areas of the midlands and the north to mean someone who listens to rock-derived music and/or dresses in a manner that suggests they affiliate themselves with rock music of some kind.

Some grebo passed with Sabbath playing on his stereo.
The Poppies are at no. 17? God, a grebo band in the charts!
They're playing nu-metal now, bloody grebos!

grebo by cactuscat September 15, 2006