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1.
Someone who doesn't shower or bathe as a statement.
I can smell that crusty all the way from here.
by libra July 08, 2004
 
2.
A phrase to describe someone who is dirty, trashy, slutty, etc.
That crusty ass bitch got with my boyfriend last night. Stupid Hoe.
by Ashhfbaby June 22, 2009
 
3.
aka crustpunks crustypunks. plural form of the terms crusty and crustpunk. crusties are fans of the genre of harsh punk rock/hardcore music called crustcore, crust punk or simply crust. a member of the crustcore punk scene. some crusties are also squatters or homeless. some obvious looks associated with the crusty milieu are black cloths, butt flaps, facial tattoos, lots of patches, dread locks and punk rock hair styles, bottle and lighter heads clamped on to clothes, canine animal companions, bullet belts and sleeveless jean jackets. some popular bands include Dystopia, Amebix, Antiscism, Mankind?, Doom, and Hiatus.
hey did you see those 2 drunk crusties kids get in a fight over a dumpstered bagel yesterday?
by darkmugan May 27, 2005
 
4.
Adjective used to decribe old people,a gross unidentified substance, anything broken, dirty, crumby, badly made/conceived, falling apart, stupid, wierd, gross, this word can be used very freely as it goes with anything that may have to do with the word crust but it never describes anything good.
1: that old man keeps staring at me
2: eww look how crusty he is

-or-

1: i just got this from the dollar store and the lid wont close on it
2: here let me try... damn its not working it sooo crusty
1:that whole dollar store is crusty

-or-

1:Mr Tawil thinks he can teach us history by giving us a whole bunch of crosswords, he is such a crust.
2:Yea, he smell like weed, cigarettes and bagels, he is such a crusty old man.

-or-
1:ew look at the crust under this desk
2: that's gum , you dumbass
by Naomiiiiii January 16, 2007
 
5.
Something grotesque, dirty, or hideous.
"That girl is so crusty looking!"
"That boy smells crusty!"
"You are so crusty!"
by AIMSNccrackkkheadd September 03, 2007
 
6.
a fan of the genre of harsh punk rock/hardcore music called crustcore, crust punk or simply crust. a member of the crustcore punk scene. many crusties are also squatters or homeless. some obvious looks associated with the crusties milieu are black cloths, butt flaps, facial tattoos, lots of patches, dread locks and punk rock hair styles, bullet belts and sleeveless jean jackets. crusty is also used as an adjective to describe a band's sound.
you know the guy, that crusty squatter kid with that face tat and the dog.

Man, Dystopia sounds so crusty!
by darkmugan May 11, 2005
 
7.
ugly nasty dry ass nigga who needs chapstick
This bitch is nasty as hell. Motherfucker need some chapstick. Crusty ass hoe.
by naviii003 October 28, 2012