Grohlism 

The religion which follows lead singer of The Foo Fighters and former drummer of Nirvana "Dave Grohl"

Pat: "Do you follow Christianity?"
Chris: "No, I follow Grohlism"

Grohlism by foo fan December 18, 2011

dave grohlasm 

the heightened state of excitement or ecstasy experienced when watching or listening to Dave Grohl of the Foo Fighters.

Mel experienced multiple dave grohlasms when listening to the Foo Fighters new album.

dave grohlasm by mdtx2 October 3, 2007