Unlike other punks, crustys generally do not have the wacky colored hairstyles , instead their hair is usually natural colored, and fairly short, though most of them don't give 2 shits about it.
Crust music is loud fast and abrasive, all crust is anti-racist and all is anti-war, thus earnign crusty's the demeaning term of "hippie punks."
Lyrics to crust songs tend to be dark, and based around politics and current events and even some human emotion; topics such as nuclear destruction, environmentalism, racial equality, squatting/non-conformity, apocalypse, abolishing sexism, animal rights, veganism/vegetarianism, religious control, death (and/or escaping life) and anarchism are common. Crust is one of the darkest subgenres of punk, and also is one of the least recognizable as punk, in terms of sound. Elements of the crust sound can be heard in many Anarcho-punk bands, such as those signed to Profane Existence, Mortarhate Records, Havoc Records, & Life is Abuse Records.
Many consider the band Amebix to be the godfathers of crust punk, and consider the Arise! LP to be the first known defining crust punk album. The band Deviated Instinct, who actually coined the term "crust punk", was one of the first bands to play the genre as it commonly recognized today.
Listeners of crust punk music are often referred to as crusties
Crust can also be applied to women.
Someone can be "crusty" if they have these features
Somebody has got to trim this crust from around my ears and on the back of my neck.
Im never going to get any pussy with all of this crust I have on my head.
"Hey man..I need a favor"...."Ok, well ill only do it if you trim my crust first"