Crusty means Sketchy or dangerous. It can mean not very well made or poorly constructed. It can also be used by saying something is not healthy.
I don't want to walk across that dock man, its pretty crusty.

(looking at the poorly constructed building)

Man: That's crusty...
by DillOlive September 30, 2011
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the gunk that forms in the corners of your lips after drinking a bottle of gatorade
No one said anything, so Billy played the whole game with red crustys on his face
by footballfiend5 February 7, 2009
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People of any age that identify with a subculture that is not necessarily crust punk, hippie, dirty kids or punk. They travel in groups and all look alike and look like hippies, dirty kids or your usual homeless person. The do not bath, so hair usually mats, don't work, so dumpster food, or beg for scraps and doggie bags.

They are from Middle to well-to-do families which allows them to carry on the homeless gig late into life.

Some claim to be anti-government which would not make sense if it were true because they all dumpster in mainstream merican places and participate in American Culture in every way EXCEPT bathing and working.

They are very snobbish, only clinging to those within their clique.

Most of the women tend to drink alot and have pot-bellies, the other beautiful women are usually seen with hideous, rotten-toothed men.
The crusties have invaded New Orleans, LA and should go home to their parents soon - your parents have a house, car, and lots of land waiting for you!
by Jackson Star February 25, 2009
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kids who listen to crust, wear black clothes, wear patches, dont take showers, some of them are vegan or vegetarian and believe in animal rights, wear an indian oil pachuey(sp?). They stand up to what they believe in, and usually talk A LOT of shit.
bands: Nausea, Doom, Disrupt..
by Vanessa December 23, 2004
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Just unappealing in basically every way possible.
"Umm yeah, so she was being extremely crusty so I just blew her up with a sea urchin bomb!"
by Jesse1018 August 4, 2008
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The gross, white, puss looking crust which forms after a recent piercing. Although you desperately want to pick them off, they do indeed help your piercing heal faster.
Dude the crusties around my nose ring have turned bloody!

Paul had a bad habit of picking at his plugs crusties...
by dharma punk July 11, 2008
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Vile spawn of Hippies and Punks, these creatures are so-called because their personal habits include not washing until there is a thick crust of dirt all over them. Often seen sporting crusted dreadlocks as well, and when their itching heads get too much, shaved heads. Must-have accessories for any self-respecting crusty: a dog on a string, army boots, stinking patchouli oil, constant odour of garlic.
Crusties are rabid supporters of political correctness- everyone is equal in their eyes, except of course anyone who does not believe in being a vegan, animal-liberating, tax-dodging punk rocker- everyone else is scum! Crusties tend to congregate at summer rock festivals, camping out and eating vegan slop. The rest of the year, they will travel around in delapidated buses and vans trying to find a place to camp and constantly getting kicked off the land wherever they settle like a swarm of festering dung flies.
Nearly all Crusties are rich middle class kids who think it's cool not to wash for a few years and kill their brain cells with too much acid. Then when it all gets too much, they can go home to Mummy and Daddy and clean up their act and get a job as a social worker or teacher.
"I could smell those Crusties a mile away when I was at Glastonbury festival."
by Gigi UK May 3, 2005
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