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
someone who is absolutley repulsive to the point where you cannot even look into thier eyes

there is nothing good about them. they look/walk/talk/dress/smell funny, wierd, disgusting, and downright ugly.

these ppl have no reason to roam the earth like they do; they are the reason for global warming and everything that is going on.

there are many variations of this word like:
CRUST
CRUSTATIOUS
CRUSTATION(S)
CRUSTY MOFO
CRUSY ASS BITCH
CRUSTIVITY
or
DUSTY
yo, look at the crustatious man sitting there.

this dude is crusty as hell

OMG look at the mob of crustations taking over ccm!

what is that smell? oh its the crustivity that is going on with those nerds.
by ilovecrustyppl November 01, 2009
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 24, 2009
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 10, 2008
Giving someone a dirty look
That guy is giving me a crusty
WOW you give a mean crusty
by SheaButter69 July 10, 2008
a greasy, yellow-teethed, not clean, nasty-skinned person.
crusty in all aspects of the word.
that chick has really crusty skin.
by ali and brooke June 21, 2008
crusty's come's from the ass crack the stick to ya jocks.
doing a sloppy fart and it becomes hard and u have stained jocks and it dont feel good.
by SaiNt_SaRaCeN November 16, 2003
To place a bare ass, in an unsuspecting persons face and farting.
Dat splatter on T-bones face is from a crusty, Dogg!
Fo shizzel my nizzel krizzle drizzle!
by Bang'n September 13, 2005

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