face-melter

noun

face-melter

noun

1

Entertainment, Lifestyle, Music Slang Particularly in heavy metal music, a musical passage or sung note that is particularly intense.

And then they launch into a face-melter by way of acoustics, playing so hard that one expects Thile's fingers either to spontaneously combust or at least start spurting blood.2005, No Depression, numbers 55-60, page 97:
Can You Rock, an Indy-based live karaoke band, gives those face-melters some actual context.2009, Indianapolis Monthly, volume 32, numbers 10-14, page 10:

2 more examples

Whenever it is uttered by a character on the show, the first person in the room to dash off a searing face-melter of a musical run wins the round.2010, Greg Horne, The Couch Potato Guitar Workout, page 47:
“Wee-weewee [Psycho music].” “Marvin Glasscock! Dude comes in with the total facemelter!!!”2013, William Landay, Defending Jacob: A Novel, page 209:

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